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Chico, California climate
Csa Hot-summer Mediterranean
Chico has a seasonal mild-temperate climate (Hot-summer Mediterranean, Köppen Csa). The hottest month is July with an average daily high near 95°F, while the coldest is January averaging around 36°F at night. Precipitation totals about 27 inches a year and is strongly seasonal — February alone averages 5.1 inches while July barely receives 0.03 inches.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsChico climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 56 | 62 | 67 | 73 | 81 | 89 | 95 | 94 | 91 | 80 | 65 | 57 |
| Avg temp (°F) | 46 | 50 | 54 | 59 | 67 | 73 | 78 | 77 | 73 | 64 | 52 | 46 |
| Avg low (°F) | 36 | 38 | 42 | 45 | 52 | 57 | 61 | 59 | 55 | 47 | 40 | 36 |
| Precipitation (in) | 5.1 | 5.1 | 3.6 | 2.0 | 1.4 | 0.6 | 0.0 | 0.1 | 0.3 | 1.7 | 2.4 | 5.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 56 | 62 | 67 | 73 | 81 | 89 |
| Avg temp (°F) | 46 | 50 | 54 | 59 | 67 | 73 |
| Avg low (°F) | 36 | 38 | 42 | 45 | 52 | 57 |
| Precipitation (in) | 5.1 | 5.1 | 3.6 | 2.0 | 1.4 | 0.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 95 | 94 | 91 | 80 | 65 | 57 |
| Avg temp (°F) | 78 | 77 | 73 | 64 | 52 | 46 |
| Avg low (°F) | 61 | 59 | 55 | 47 | 40 | 36 |
| Precipitation (in) | 0.0 | 0.1 | 0.3 | 1.7 | 2.4 | 5.0 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 8 | 7 | 5 | 4 | 2 | 0.2 | 0.4 | 0.8 | 3 | 5 | 7 |
| Days with high ≥ 90°F (days) | — | — | — | 0.8 | 4 | 10 | 18 | 18 | 14 | 4 | 0.0 | — |
| Days with low ≤ 32°F (days) | 8 | 4 | 2 | 0.5 | — | — | — | — | — | 0.4 | 3 | 8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 8 | 7 | 5 | 4 | 2 |
| Days with high ≥ 90°F (days) | — | — | — | 0.8 | 4 | 10 |
| Days with low ≤ 32°F (days) | 8 | 4 | 2 | 0.5 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 0.2 | 0.4 | 0.8 | 3 | 5 | 7 |
| Days with high ≥ 90°F (days) | 18 | 18 | 14 | 4 | 0.0 | — |
| Days with low ≤ 32°F (days) | — | — | — | 0.4 | 3 | 8 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 59 | 55 | 48 | 39 | 24 | 12 | 13 | 19 | 31 | 50 | 61 |
| Clear days (≤ 30% cloud) | 8 | 7 | 10 | 12 | 16 | 22 | 27 | 27 | 23 | 19 | 10 | 7 |
| Partly cloudy days (30–70%) | 8 | 9 | 9 | 8 | 8 | 5 | 3 | 3 | 5 | 7 | 10 | 10 |
| Cloudy days (≥ 70%) | 15 | 13 | 13 | 10 | 7 | 3 | 0.9 | 1 | 2 | 5 | 10 | 14 |
| Relative humidity (%) | 78 | 78 | 77 | 72 | 61 | 45 | 31 | 29 | 30 | 41 | 59 | 74 |
| Wind speed (mph) | 4.2 | 4.7 | 4.6 | 4.4 | 4.3 | 4.3 | 4.6 | 4.4 | 4.0 | 4.1 | 4.1 | 4.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 59 | 55 | 48 | 39 | 24 |
| Clear days (≤ 30% cloud) | 8 | 7 | 10 | 12 | 16 | 22 |
| Partly cloudy days (30–70%) | 8 | 9 | 9 | 8 | 8 | 5 |
| Cloudy days (≥ 70%) | 15 | 13 | 13 | 10 | 7 | 3 |
| Relative humidity (%) | 78 | 78 | 77 | 72 | 61 | 45 |
| Wind speed (mph) | 4.2 | 4.7 | 4.6 | 4.4 | 4.3 | 4.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 12 | 13 | 19 | 31 | 50 | 61 |
| Clear days (≤ 30% cloud) | 27 | 27 | 23 | 19 | 10 | 7 |
| Partly cloudy days (30–70%) | 3 | 3 | 5 | 7 | 10 | 10 |
| Cloudy days (≥ 70%) | 0.9 | 1 | 2 | 5 | 10 | 14 |
| Relative humidity (%) | 31 | 29 | 30 | 41 | 59 | 74 |
| Wind speed (mph) | 4.6 | 4.4 | 4.0 | 4.1 | 4.1 | 4.6 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Chico Univ Farm (NOAA GHCN station USC00041715), about 4 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.