Last updated: March 2, 2024
Under the Köppen–Geiger climate classification Santa Rosa features a cold semi-arid climate (BSk). Temperatures typically range between 4 °C (39 °F) and 26 °C (80 °F) through the year, but rarely can drop to -25 °C (-13 °F) or can rise to as high as 42 °C (108 °F). The average annual precipitation amounts to about 344 mm (13.5 inches) and receives 55 rainy days on the 1 mm (0.04 inches) threshold annually. Santa Rosa enjoys an average of 3571 hours of sunshine throughout the year, and daylight varies from 9 hours 50 minutes to 14 hours 27 minutes per day.
The warmest months in Santa Rosa are June, July and August, with daily mean temperatures ranging from 25 to 26 °C (77 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 6 °C (39 - 43 °F) throughout the day. On average each year, Santa Rosa experiences 143 days above 25 °C (77.0 °F) and 66 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 20°C (69°F) |
27°C (81°F) |
29°C (85°F) |
32°C (89°F) |
36°C (97°F) |
39°C (103°F) |
42°C (108°F) |
39°C (102°F) |
37°C (99°F) |
32°C (90°F) |
27°C (82°F) |
23°C (74°F) |
| Mean maximum | 18°C (65°F) |
22°C (72°F) |
27°C (81°F) |
30°C (87°F) |
34°C (93°F) |
37°C (98°F) |
38°C (100°F) |
36°C (98°F) |
35°C (96°F) |
30°C (86°F) |
25°C (77°F) |
20°C (69°F) |
| Average high | 11°C (52°F) |
13°C (56°F) |
18°C (65°F) |
22°C (72°F) |
28°C (82°F) |
33°C (91°F) |
33°C (92°F) |
32°C (90°F) |
30°C (85°F) |
22°C (72°F) |
17°C (63°F) |
12°C (54°F) |
| Daily mean | 4°C (39°F) |
6°C (43°F) |
11°C (51°F) |
14°C (58°F) |
20°C (68°F) |
25°C (78°F) |
26°C (80°F) |
25°C (77°F) |
22°C (72°F) |
14°C (58°F) |
9°C (49°F) |
5°C (42°F) |
| Average low | -2°C (29°F) |
-1°C (31°F) |
3°C (38°F) |
6°C (44°F) |
12°C (53°F) |
17°C (63°F) |
19°C (67°F) |
18°C (65°F) |
15°C (59°F) |
8°C (46°F) |
3°C (38°F) |
-1°C (31°F) |
| Mean minimum | -14°C (8°F) |
-13°C (10°F) |
-5°C (23°F) |
-2°C (28°F) |
4°C (40°F) |
11°C (52°F) |
16°C (61°F) |
15°C (60°F) |
8°C (47°F) |
-3°C (26°F) |
-4°C (24°F) |
-9°C (15°F) |
| Minimum | -25°C (-13°F) |
-22°C (-7°F) |
-11°C (12°F) |
-6°C (21°F) |
1°C (34°F) |
9°C (49°F) |
15°C (59°F) |
14°C (58°F) |
3°C (37°F) |
-9°C (15°F) |
-7°C (19°F) |
-16°C (3°F) |
Compare temperature, precipitation, sunshine, UV index in Santa Rosa, New Mexico, United States with other places around the world.
Santa Rosa usually has the most precipitation in June, August and October, with an average of 6 rainy days and 48 mm (1.9 inches) of precipitation per month. The driest months in Santa Rosa are February, November and December. On average, 12 mm (0.5 inches) of precipitation falls during these months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average precipitation mm (inches) | 15 (0.6) | 12 (0.5) | 28 (1.1) | 27 (1.1) | 30 (1.2) | 41 (1.6) | 31 (1.2) | 56 (2.2) | 33 (1.3) | 47 (1.9) | 14 (0.6) | 11 (0.4) |
| Average precipitation days (≥ 1 mm) | 3 | 4 | 3 | 3 | 4 | 6 | 9 | 9 | 5 | 5 | 2 | 2 |
The sunniest months in Santa Rosa are May, June and July, when the sun shines an average of 11 hours 43 minutes a day. Least sunny months in Santa Rosa: January, February and November receive an average of 7 hours 47 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 198 | 246 | 291 | 316 | 351 | 356 | 369 | 345 | 302 | 277 | 256 | 258 |
| Mean daily daylight hours | 10h 5m | 10h 55m | 11h 59m | 13h 5m | 14h 0m | 14h 27m | 14h 12m | 13h 23m | 12h 20m | 11h 15m | 10h 18m | 9h 50m |
Santa Rosa experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 12 - 13, which corresponds to the Extreme category of sun exposure. January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Santa Rosa UV Index data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (month maximum) | 4 | 7 | 9 | 11 | 12 | 13 | 12 | 12 | 11 | 8 | 5 | 4 |
Discover in-depth weather details for every month in Santa Rosa. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Santa Rosa's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.
Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.