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California State Climatologist
Department of Water Resources

3310 El Camino Avenue, Suite 200
Sacramento, CA 95821

Mailing Address:
P.O. Box 219000
Sacramento, CA 95821-9000


DWR My CA

Sacramento Hydrologic Region

Region Avg	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Avg Temp	41.2	44.2	47.4	52.1	59.3	66.4	72.0	71.0	66.3	57.8	47.0	41.1	55.5
Std Dev T	2.2	2.6	2.8	3.1	3.1	2.4	2.1	1.8	2.5	2.9	2.9	2.7	0.9
Avg Precip	6.86	6.42	5.81	2.45	1.62	0.65	0.20	0.26	0.87	2.07	4.79	5.40	37.40
Std Dev P	5.02	4.68	4.15	1.55	1.53	0.55	0.38	0.38	0.96	1.61	3.89	4.14	13.02

Location: ADIN RS

Location: ADIN RS

State: CA

Lat: 41 12'

Long: -120 57'

Elev: 4195

ID: 040029

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 23.3 26.9 30.3 33.7 38.9 44.6 49.8 49.1 43.7 36.5 30 23.3 35.8

Maximum 43.1 47.2 52.5 59.3 67.8 76.4 84.9 84.3 77.8 66.6 51.8 42.7 62.9

Mean 33.2 37.1 41.4 46.5 53.4 60.5 67.4 66.7 60.8 51.6 40.9 33 49.4

Precip. 1.97 1.84 1.9 1.22 1.58 1 0.37 0.43 0.87 1.16 1.82 1.72 15.88

HDD 986 782 732 556 366 175 39 48 165 423 723 993 5988

CDD 0 0 0 0 5 39 113 99 37 7 0 0 300

Location: ALTURAS

Location: ALTURAS

State: CA

Lat: 41 30'

Long: -120 33'

Elev: 4400

ID: 040161

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 18.1 21.4 25.3 28.2 34.1 39.8 43.8 42 35.8 28.1 23.3 17.7 29.8

Maximum 43.2 47.4 52.7 59.8 68.8 78.6 88.1 87.6 79.5 67.3 51 43.1 63.9

Mean 30.7 34.4 39 44 51.5 59.2 66 64.8 57.7 47.7 37.2 30.4 46.9

Precip. 1.32 1.28 1.55 1.11 1.32 0.79 0.3 0.37 0.66 0.73 1.47 1.23 12.13

HDD 1066 856 806 630 423 203 74 73 232 537 835 1073 6808

CDD 0 0 0 0 2 29 102 68 11 0 0 0 212

Location: AUBURN

Location: AUBURN

State: CA

Lat: 38 54'

Long: -121 05'

Elev: 1292

ID: 040383

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 37.6 40.5 42.4 45.4 50.8 57.1 62.7 62 58.8 52.3 43.2 37.7 49.2

Maximum 54.2 58.2 61.6 67.7 75.9 84.6 91.3 90.7 85.2 75.6 61.4 54.6 71.8

Mean 45.9 49.4 52 56.6 63.4 70.9 77 76.4 72 64 52.3 46.2 60.5

Precip. 6.68 6.28 6.16 2.5 1.3 0.37 0.14 0.14 0.77 1.93 4.89 5.35 36.51

HDD 593 437 405 269 142 27 1 1 21 126 386 584 2992

CDD 0 0 3 16 90 203 372 352 232 93 5 0 1366

Location: BLUE CANYON

Location: BLUE CANYON

State: CA

Lat: 39 17'

Long: -120 43'

Elev: 5280

ID: 040897

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 32.9 32.7 33 36.5 44.3 52 58.3 57.8 53.1 45.9 36.2 32.6 42.9

Maximum 44.7 44.9 46.4 52.5 61 69.7 76.9 76.8 71.4 62.3 49.4 45.6 58.5

Mean 38.8 38.8 39.7 44.5 52.7 60.9 67.6 67.3 62.3 54.1 42.8 39.1 50.7

Precip. 11.72 11.57 10.5 4.98 2.93 0.88 0.37 0.43 1.44 3.86 8.97 8.71 66.36

HDD 813 733 715 617 397 165 48 54 166 367 667 803 5545

CDD 0 0 0 1 15 41 129 125 84 28 0 0 423

Location: BOWMAN DAM

Location: BOWMAN DAM

State: CA

Lat: 39 27'

Long: -120 39'

Elev: 5383

ID: 041018

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 26.4 25.9 27.8 31.6 38.2 45.8 51.8 52.3 47.9 40.6 31.4 26.7 37.2

Maximum 45 45.8 47.5 53.8 62.3 72.1 79.4 79.6 73.9 64.3 51.2 45.5 60

Mean 35.7 35.9 37.7 42.7 50.3 59 65.6 66 60.9 52.5 41.3 36.1 48.6

Precip. 12.04 11.04 10.34 4.49 3.35 1.22 0.37 0.57 1.56 4.22 9.04 9.73 67.97

HDD 909 816 777 669 465 209 85 76 176 404 711 896 6193

CDD 0 0 0 0 7 28 103 105 53 15 0 0 311

Location: BROOKS FARNHAM RANCH

Location: BROOKS FARNHAM RANCH

State: CA

Lat: 38 46'

Long: -122 09'

Elev: 294

ID: 041112

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 35.1 37.9 40.1 42.9 48.5 54.9 57.6 56.9 53.1 47.2 39.1 34.2 45.6

Maximum 56.5 61.7 65.9 72.9 81.9 90.9 96.4 96 91.1 81.1 65.6 57.6 76.5

Mean 45.8 49.8 53 57.9 65.2 72.9 77 76.5 72.1 64.2 52.4 45.9 61.1

Precip. 3.82 3.45 2.63 0.93 0.35 0.1 0.03 0.04 0.2 0.92 2.56 2.83 17.86

HDD 595 426 373 230 98 6 0 0 10 103 381 593 2815

CDD 0 0 1 17 105 244 372 355 222 75 2 0 1393

Location: BUCKHORN

Location: BUCKHORN

State: CA

Lat: 40 52'

Long: -121 51'

Elev: 3800

ID: 041149

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Precip. 10.58 9.75 9.43 5.38 3.69 1.54 0.32 0.63 2.14 4.27 9.15 9.14 66.02

Location: BUCKS CREEK P H

Location: BUCKS CREEK P H

State: CA

Lat: 39 55'

Long: -121 20'

Elev: 1759

ID: 041159

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Precip. 12.41 11.5 11.08 5.19 2.97 1.22 0.15 0.32 1.47 3.81 9.03 10.32 69.47

Location: BURNEY

Location: BURNEY

State: CA

Lat: 40 53'

Long: -121 39'

Elev: 3198

ID: 041214

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 18.3 22.2 24.9 28.1 33.6 39.2 42.6 39.8 33.6 26.8 22.8 18.4 29.2

Maximum 45.5 51.2 56.6 63 71.7 80.3 88.6 88.2 81.7 69.8 52.8 44.8 66.2

Mean 31.9 36.7 40.8 45.6 52.7 59.8 65.6 64 57.7 48.3 37.8 31.6 47.7

Precip. 4.4 4.06 3.83 1.95 1.64 0.76 0.2 0.37 0.87 1.69 3.36 3.76 26.89

HDD 1026 792 753 584 386 180 78 91 236 518 815 1036 6495

CDD 0 0 0 0 3 23 97 59 14 0 0 0 196

Location: CANBY 3 SW

Location: CANBY 3 SW

State: CA

Lat: 41 25'

Long: -120 54'

Elev: 4310

ID: 041476

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 20.2 22.4 27 30.4 36.1 42.4 46.6 44.4 37.1 29.2 23.1 18.7 31.5

Maximum 40.7 45.9 51.1 57.8 67.1 76.4 85.6 85.1 77.2 66.2 49.4 41.5 62

Mean 30.5 34.2 39.1 44.1 51.6 59.4 66.1 64.8 57.2 47.7 36.3 30.1 46.8

Precip. 1.85 1.95 2.19 1.46 1.48 0.84 0.26 0.4 0.77 1.08 2.11 2.06 16.45

HDD 1071 864 805 628 417 193 63 76 245 537 861 1082 6842

CDD 0 0 0 0 1 24 96 68 10 0 0 0 199

Location: CANYON DAM

Location: CANYON DAM

State: CA

Lat: 40 10'

Long: -121 05'

Elev: 4560

ID: 041497

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 23 24.9 27.6 30.7 36.8 43 48 46.7 41.8 34.9 28.6 23.6 34.1

Maximum 40 43.8 49.5 57.6 67.1 76.2 84 83.4 76.1 64.1 48.2 40.4 60.9

Mean 31.5 34.4 38.6 44.2 52 59.6 66 65.1 59 49.5 38.4 32 47.5

Precip. 6.68 6.72 5.71 2.44 1.64 0.76 0.25 0.35 0.93 2.18 4.71 5.43 37.8

HDD 1039 858 820 626 409 188 70 84 209 484 798 1024 6609

CDD 0 0 0 0 5 27 102 84 27 2 0 0 247

Location: CHALLENGE R S

Location: CHALLENGE R S

State: CA

Lat: 39 29'

Long: -121 13'

Elev: 2570

ID: 041653

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Precip. 12.58 11.83 10.1 4.56 2.19 0.83 0.17 0.25 1.19 3.58 8.96 10.05 66.29

Location: CHESTER

Location: CHESTER

State: CA

Lat: 40 18'

Long: -121 14'

Elev: 4525

ID: 041700

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 20.1 22.7 26.1 29.3 35.2 41.5 45.8 44.1 39 32.2 26.1 20.7 31.9

Maximum 41.8 45.7 51.1 58.5 67.5 76.4 84.4 83.8 77.3 66 49.8 42 62

Mean 31 34.2 38.6 43.9 51.4 59 65.1 64 58.2 49.1 38 31.4 47

Precip. 5.91 5.62 4.9 2.04 1.59 0.79 0.37 0.39 0.9 2 3.84 4.62 32.97

HDD 1055 863 819 633 431 210 80 84 218 495 812 1043 6743

CDD 0 0 0 0 7 28 82 52 14 1 0 0 184

Location: CHICO UNIVERSITY FARM

Location: CHICO UNIVERSITY FARM

State: CA

Lat: 39 41'

Long: -121 49'

Elev: 185

ID: 041715

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 35.2 38.6 41.5 44.9 51.3 57 60.7 58.6 54.6 47.3 40.2 34.8 47.1

Maximum 53.7 60 64.9 71.9 80.1 87.8 93 92.2 88.4 78.7 63 54.4 74

Mean 44.5 49.3 53.2 58.4 65.7 72.4 76.9 75.4 71.5 63 51.6 44.6 60.5

Precip. 5.17 4.5 4.32 1.59 0.91 0.47 0.05 0.16 0.59 1.34 3.5 3.63 26.23

HDD 637 439 368 223 93 8 0 0 12 130 403 632 2945

CDD 0 0 2 24 114 229 367 323 207 67 1 0 1334

Location: CLEARLAKE 4 SE

Location: CLEARLAKE 4 SE

State: CA

Lat: 38 55'

Long: -122 34'

Elev: 1349

ID: 041806

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 31.8 34.3 36.5 39.1 44.7 51.3 55.4 54.1 49.3 42.4 35.4 31.2 42.1

Maximum 55.2 57.7 60.6 66.5 74.3 83.3 90.4 89.6 84 74.4 61.3 55.1 71

Mean 43.5 46 48.6 52.8 59.5 67.3 72.9 71.9 66.7 58.4 48.4 43.2 56.6

Precip. 6.01 5.37 4.37 1.39 0.94 0.22 0.06 0.08 0.45 1.41 3.42 4.27 27.99

HDD 666 533 510 373 205 48 9 5 54 225 500 676 3804

CDD 0 0 0 7 35 117 253 218 103 20 0 0 753

Location: COLEMAN FISHERIES STA

Location: COLEMAN FISHERIES STA

State: CA

Lat: 40 24'

Long: -122 09'

Elev: 420

ID: 041907

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Precip. 5.5 4.37 4.25 2.1 1.77 0.57 0.22 0.29 1.16 1.74 3.51 4.3 29.78

Location: COLFAX

Location: COLFAX

State: CA

Lat: 39 07'

Long: -120 57'

Elev: 2400

ID: 041912

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 35.2 36.9 38.4 41.8 48 55.3 60.7 59.1 54.7 47.1 38.6 34.3 45.8

Maximum 55.6 58.1 60.4 66.3 73.9 82.8 89.6 89.2 84.2 74.6 60.7 55.4 70.9

Mean 45.4 47.5 49.4 54.1 61 69.1 75.2 74.2 69.5 60.9 49.7 44.9 58.4

Precip. 8.77 8.43 7.7 3.19 1.7 0.59 0.19 0.23 1.08 2.58 6.44 7.02 47.92

HDD 607 491 483 341 191 53 11 6 51 190 463 625 3512

CDD 0 0 1 12 66 174 325 291 184 61 2 0 1116

Location: COLGATE P H

Location: COLGATE P H

State: CA

Lat: 39 20'

Long: -121 12'

Elev: 595

ID: 041916

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Precip. 7.62 6.82 6.52 2.84 1.53 0.55 0.13 0.16 0.84 2.31 5.77 6.23 41.32

Location: COLUSA 2 SSW

Location: COLUSA 2 SSW

State: CA

Lat: 39 11'

Long: -122 02'

Elev: 50

ID: 041948

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 37.6 41.3 44.4 46.8 54.3 58.9 60.5 58.7 55 49 41.5 37 48.8

Maximum 53.5 59.8 64.8 72.4 80.7 88.4 93.2 92.1 88 78.6 62.9 54 74

Mean 45.6 50.6 54.6 59.6 67.5 73.7 76.9 75.4 71.5 63.8 52.2 45.5 61.4

Precip. 3.65 3.07 2.71 0.77 0.65 0.2 0.04 0.04 0.34 0.94 2.15 2.34 16.9

HDD 603 406 329 190 67 4 0 0 8 105 385 605 2702

CDD 0 0 6 27 145 262 367 322 202 68 2 0 1401

Location: CORNING HOUGHTON RANCH

Location: CORNING HOUGHTON RANCH

State: CA

Lat: 39 54'

Long: -122 21'

Elev: 487

ID: 042027

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Precip. 3.99 4.09 3.23 1.29 0.56 0.25 0.12 0.11 0.33 1.1 2.44 3.13 20.64

Location: DAVIS 2 WSW EXP FARM

Location: DAVIS 2 WSW EXP FARM

State: CA

Lat: 38 32'

Long: -121 47'

Elev: 60

ID: 042294

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 37.1 39.8 42.4 45.1 50 54.5 55.9 55 53.3 48 40.8 36.1 46.5

Maximum 53.3 59.8 64.7 72 80.3 88.2 92.7 91.7 88 78.9 63.6 53.9 73.9

Mean 45.2 49.8 53.6 58.6 65.2 71.4 74.3 73.4 70.7 63.5 52.2 45 60.2

Precip. 4.04 3.76 3.03 0.97 0.55 0.18 0.03 0.04 0.3 0.9 2.44 2.81 19.05

HDD 614 425 358 215 99 11 0 1 15 109 386 620 2853

CDD 0 0 3 20 104 202 289 261 185 61 2 0 1127

Location: DE SABLA

Location: DE SABLA

State: CA

Lat: 39 52'

Long: -121 37'

Elev: 2710

ID: 042402

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 31.8 33.5 35 38.3 44 50.3 54.9 54 50.1 44 35.7 31.7 41.9

Maximum 53.3 55.8 59.1 65.6 74.1 83.4 90.3 90.2 84.6 74.1 58.9 52.9 70.2

Mean 42.6 44.7 47.1 52 59.1 66.9 72.6 72.1 67.4 59.1 47.3 42.3 56.1

Precip. 12.18 11.54 10.41 4.63 2.46 0.91 0.16 0.32 1.46 3.58 8.48 9.72 65.85

HDD 696 570 557 401 222 67 9 9 56 218 531 704 4040

CDD 0 0 0 9 39 123 246 228 127 34 0 0 806

Location: DEER CREEK FOREBAY

Location: DEER CREEK FOREBAY

State: CA

Lat: 39 18'

Long: -120 50'

Elev: 4455

ID: 042338

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 32.1 32.2 33 37.1 44 50.9 57.7 57.8 53 45.5 36.5 32.2 42.7

Maximum 49.9 50.5 53 59.7 67.9 76.6 83.7 84.1 78.2 67.7 54.9 50.4 64.7

Mean 41 41.4 43 48.4 56 63.8 70.7 71 65.6 56.6 45.7 41.3 53.7

Precip. 12.9 13.31 11.17 5 2.94 0.96 0.26 0.34 1.46 3.53 9.29 9.42 70.58

HDD 744 662 627 509 317 105 25 21 106 306 581 736 4739

CDD 0 0 0 9 35 68 202 207 124 45 2 0 692

Location: DOBBINS 1 S

Location: DOBBINS 1 S

State: CA

Lat: 39 22'

Long: -121 12'

Elev: 1640

ID: 042456

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 33.5 35.5 37.7 40.2 45.9 51.5 55.7 54.1 50.5 43.8 36.5 32.5 43.1

Maximum 56.7 59.9 62.3 68.5 76.4 86.1 93.4 92.9 87.4 77 62.7 56.8 73.3

Mean 45.1 47.7 50 54.4 61.2 68.8 74.6 73.5 69 60.4 49.6 44.7 58.3

Precip. 9.23 8.29 8.05 3.43 1.96 0.5 0.15 0.17 1.02 2.75 7.21 7.34 50.1

HDD 617 485 466 326 176 38 2 1 33 182 462 630 3418

CDD 0 0 0 6 56 151 298 265 152 41 0 0 969

Location: DOWNIEVILLE

Location: DOWNIEVILLE

State: CA

Lat: 39 34'

Long: -120 49'

Elev: 2914

ID: 042500

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 29.5 31 32.8 35 40.4 45.4 49.2 48.3 44.5 38.1 32.5 29.1 38

Maximum 48.6 53.1 58.2 65 72.8 82 88.7 88.8 83.1 72.6 56 48.2 68.1

Mean 39.1 42.1 45.5 50 56.6 63.7 69 68.6 63.8 55.4 44.3 38.7 53.1

Precip. 11.07 10.69 9.84 4.56 2.92 0.93 0.32 0.34 1.51 3.63 8.04 8.79 62.64

HDD 804 643 606 452 281 95 19 28 104 312 622 816 4782

CDD 0 0 0 3 19 56 142 137 67 14 0 0 438

Location: DUNSMUIR TREATMENT PLAN

Location: DUNSMUIR TREATMENT PLAN

State: CA

Lat: 41 11'

Long: -122 16'

Elev: 2170

ID: 042574

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 28.3 29.4 31.3 35.1 41.3 47.4 51.3 49.1 44.5 38 32.2 28.6 38

Maximum 50.1 53.7 58 65.2 73.9 82.2 89.7 89.3 83.3 72.9 56.6 50.5 68.8

Mean 39.2 41.6 44.7 50.2 57.6 64.8 70.5 69.2 63.9 55.5 44.4 39.6 53.4

Precip. 11.39 10.38 9.5 4.14 2.55 0.99 0.34 0.36 1.35 3.22 7.9 9.16 61.28

HDD 801 657 631 449 248 80 16 16 103 303 618 789 4711

CDD 0 0 0 2 18 73 186 147 70 7 0 0 503

Location: EAST PARK RESERVOIR

Location: EAST PARK RESERVOIR

State: CA

Lat: 39 22'

Long: -122 31'

Elev: 1205

ID: 042640

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 31.6 34.7 37.3 40.3 46.5 53.6 59 57 51.7 43.9 36.5 31.1 43.6

Maximum 55.4 58.6 62.1 68.6 77.3 86.3 92.9 92.1 87 77.1 62.9 56.1 73

Mean 43.5 46.7 49.7 54.5 61.9 70 76 74.6 69.4 60.5 49.7 43.6 58.3

Precip. 4.88 4.28 3.21 0.99 0.69 0.28 0.06 0.1 0.28 1.06 2.61 3.26 21.7

HDD 666 514 474 322 160 25 3 1 29 180 461 663 3498

CDD 0 0 0 6 64 173 341 297 159 41 1 0 1082

Location: FOLSOM DAM

Location: FOLSOM DAM

State: CA

Lat: 38 42'

Long: -121 10'

Elev: 350

ID: 043113

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual

Minimum 39.2 42.2 44.8 47.3 51.8 56.8 60.6 59.9 58.1 53.1 45 38.9 49.8

Maximum 54.5 60.8 65.1 71.5 80.2 88.5 94.8 93.6 88.6 78.6 63.7 55.2 74.6

Mean 46.9 51.5 55 59.4 66 72.7 77.7 76.8 73.4 65.9 54.4 47.1 62.2

Precip. 4.46 4.34