Home › Cities › United States › California › Hollister
Hollister, California climate
Csb Warm-summer Mediterranean
Hollister has a mildly seasonal mild-temperate climate (Warm-summer Mediterranean, Köppen Csb). The hottest month is August with an average daily high near 27°C, while the coldest is December averaging around 3°C at night. Precipitation totals about 348 mm a year and is strongly seasonal — January alone averages 79 mm while July barely receives 0 mm.
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 countsHollister climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 15 | 17 | 19 | 21 | 23 | 26 | 26 | 27 | 27 | 25 | 19 | 15 |
| Avg temp (°C) | 10 | 11 | 12 | 14 | 16 | 18 | 19 | 20 | 19 | 17 | 12 | 9 |
| Avg low (°C) | 4 | 5 | 6 | 7 | 9 | 11 | 12 | 12 | 11 | 9 | 6 | 3 |
| Precipitation (mm) | 79 | 67 | 57 | 25 | 11 | 2 | 0 | 0 | 1 | 16 | 32 | 58 |
| Snowfall (cm) | — | — | — | — | — | — | — | — | — | — | — | 0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 15 | 17 | 19 | 21 | 23 | 26 |
| Avg temp (°C) | 10 | 11 | 12 | 14 | 16 | 18 |
| Avg low (°C) | 4 | 5 | 6 | 7 | 9 | 11 |
| Precipitation (mm) | 79 | 67 | 57 | 25 | 11 | 2 |
| Snowfall (cm) | — | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 27 | 27 | 25 | 19 | 15 |
| Avg temp (°C) | 19 | 20 | 19 | 17 | 12 | 9 |
| Avg low (°C) | 12 | 12 | 11 | 9 | 6 | 3 |
| Precipitation (mm) | 0 | 0 | 1 | 16 | 32 | 58 |
| Snowfall (cm) | — | — | — | — | — | 0 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 8 | 7 | 7 | 4 | 2 | 0.6 | 0.1 | 0.2 | 0.4 | 2 | 4 | 7 |
| Days with high ≥ 32°C (days) | — | — | — | 0.7 | 2 | 3 | 4 | 5 | 6 | 3 | 0.1 | — |
| Days with low ≤ 0°C (days) | 5 | 2 | 0.6 | 0.4 | — | — | — | 0.1 | 0.0 | — | 2 | 7 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | — | — | — | — | — | — | — | — | 0.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 8 | 7 | 7 | 4 | 2 | 0.6 |
| Days with high ≥ 32°C (days) | — | — | — | 0.7 | 2 | 3 |
| Days with low ≤ 0°C (days) | 5 | 2 | 0.6 | 0.4 | — | — |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 0.1 | 0.2 | 0.4 | 2 | 4 | 7 |
| Days with high ≥ 32°C (days) | 4 | 5 | 6 | 3 | 0.1 | — |
| Days with low ≤ 0°C (days) | — | 0.1 | 0.0 | — | 2 | 7 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | — | — | 0.0 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 50 | 51 | 48 | 43 | 39 | 33 | 35 | 33 | 30 | 31 | 39 | 48 |
| Clear days (≤ 30% cloud) | 10 | 9 | 11 | 12 | 13 | 16 | 13 | 15 | 17 | 18 | 14 | 11 |
| Partly cloudy days (30–70%) | 10 | 9 | 10 | 11 | 13 | 11 | 16 | 14 | 11 | 9 | 9 | 10 |
| Cloudy days (≥ 70%) | 11 | 10 | 10 | 7 | 5 | 3 | 2 | 2 | 2 | 4 | 7 | 10 |
| Relative humidity (%) | 79 | 80 | 79 | 73 | 63 | 52 | 46 | 47 | 48 | 54 | 67 | 76 |
| Wind speed (m/s) | 1.6 | 1.8 | 1.9 | 2.4 | 2.8 | 3.1 | 3.0 | 2.7 | 2.3 | 1.9 | 1.7 | 1.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 50 | 51 | 48 | 43 | 39 | 33 |
| Clear days (≤ 30% cloud) | 10 | 9 | 11 | 12 | 13 | 16 |
| Partly cloudy days (30–70%) | 10 | 9 | 10 | 11 | 13 | 11 |
| Cloudy days (≥ 70%) | 11 | 10 | 10 | 7 | 5 | 3 |
| Relative humidity (%) | 79 | 80 | 79 | 73 | 63 | 52 |
| Wind speed (m/s) | 1.6 | 1.8 | 1.9 | 2.4 | 2.8 | 3.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 35 | 33 | 30 | 31 | 39 | 48 |
| Clear days (≤ 30% cloud) | 13 | 15 | 17 | 18 | 14 | 11 |
| Partly cloudy days (30–70%) | 16 | 14 | 11 | 9 | 9 | 10 |
| Cloudy days (≥ 70%) | 2 | 2 | 2 | 4 | 7 | 10 |
| Relative humidity (%) | 46 | 47 | 48 | 54 | 67 | 76 |
| Wind speed (m/s) | 3.0 | 2.7 | 2.3 | 1.9 | 1.7 | 1.7 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Hollister 2 (NOAA GHCN station USC00044025), about 2 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.