| Month | Average (°F) | Record (°F) | Average (inches) | ||
|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | |
| January | 58.1 | 38.2 | 85 | 15 | 6.4 |
| February | 61.7 | 40.2 | 93 | 20 | 6.4 |
| March | 65.2 | 42.1 | 91 | 24 | 4.5 |
| April | 69.0 | 44.1 | 98 | 26 | 2.0 |
| May | 74.3 | 47.6 | 104 | 27 | 1.2 |
| June | 81.0 | 50.8 | 109 | 30 | 0.3 |
| July | 82.7 | 52.3 | 113 | 39 | 0.0 |
| August | 83.5 | 52.5 | 107 | 34 | 0.0 |
| September | 82.9 | 50.4 | 114 | 30 | 0.1 |
| October | 77.3 | 46.6 | 105 | 24 | 1.7 |
| November | 65.7 | 41.2 | 92 | 21 | 3.4 |
| December | 57.7 | 37.7 | 83 | 9 | 6.7 |
| Entire year | 71.6 | 45.4 | 114 | 9 | 32.7 |
|
More Santa Rosa Weather Records
1902–2024
|
||
|---|---|---|
| Highest daily low | 78 °F | June 17, 1993 |
| Lowest daily high | 37 °F | December 28, 1985 |
| Greatest daily range (Difference of high and low) |
69 °F | July 22, 1917 |
| Greatest difference in daily high over two conscutive days |
32 °F | Jul 15–16, 1972 |
| Most daily precipitation | 6.1 inches | October 24, 2021 |
| Most monthly precipitation | 19.4 inches | February 1998 |
| Most yearly precipitation | 63.1 inches | 1983 |
| Most yearly days with precipitation | 132 | 1998 |
| Earliest freeze | September 11 | 1915 |
| Earliest day ≥ 90 °F | February 27 | 1923 |
| Earliest day ≥ 100 °F | May 12 | 1976 |
| Latest freeze | June 3 | 1902 |
| Latest day ≥ 90 °F | November 17 | 1932 |
| Latest day ≥ 100 °F | October 16 | 2020 |
| Most days in a year < 32 °F | 77 | 1919 |
| Most days in a year ≥ 80 °F | 154 | 1936 |
| Most days in a year ≥ 90 °F | 57 | 1936 |
| Most days in a year ≥ 100 °F | 11 | 2017 |
| Most days in a year ≥ 110 °F | 2 | 2022 |
|
Santa Rosa Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 23 days | Jan 30 – Feb 21, 1909 |
| Without precipitation | 176 days | May 27 – Nov 18, 1905 |
| High temperature ≥ 80 °F | 64 days | Jun 17 – Aug 19, 1936 |
| High temperature ≥ 90 °F | 20 days | Jun 24 – Jul 13, 1931 |
| High temperature ≥ 100 °F | 6 days | Jun 23–28, 1976 |