Hollister climate — normals and trends
Hollister (United States) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 13.4 °C and it receives 404 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (18.2 °C on average) and the coldest is January (8.4 °C). Rainfall peaks in January.
Hollister averages 10 frost days, 14 hot days (≥ 30 °C) and 48 rainy days per year.
Hollister has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.
The number of frost days there went from about 16 to 4 per year over the period.
The hottest day of the period reached 40.0 °C (on 8 September 1944) and the coldest -6.5 °C (on 22 December 1990).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
HollisterCalifornia
- coords
- 36.85°, -121.40°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.4°C
Average daily high
19.7°C
Average daily low
8.4°C
Annual rainfall
404mm
Sunshine / day
10.9h
Mean relative humidity
73%
Average peak wind
11.5km/h
Seasonal range
9.8°C
Frost days (< 0 °C)
10 d/yr
Hot days (≥ 30 °C)
14 d/yr
Rainy days (≥ 1 mm)
48 d/yr
Annual snowfall
0.7 cm
Average feels-like high
19.3 °C
Average feels-like low
6.9 °C
Average peak gust
31.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
19.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.31 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
40.0 °C
8 September 1944
Coldest day
-6.5 °C
22 December 1990
Wettest day
77 mm
11 December 2014
Windiest day
33.0 km/h
15 April 1976
Strongest gust
114.1 km/h
14 February 1986
Hottest feels-like
41.5 °C
4 August 1998
Coldest feels-like
-10.4 °C
22 December 1990
Snowiest day
6.8 cm
3 January 1974
Sunniest day
14.1 h
26 June 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 16.0 °C | +2.0 °C | 6 mm | -71 mm |
| Feb | 16.5 °C | +1.3 °C | 88 mm | +13 mm |
| Mar | 16.3 °C | +0.2 °C | 80 mm | +11 mm |
| Apr | 18.1 °C | +0.1 °C | 16 mm | -18 mm |
| May | 20.8 °C | +0.7 °C | 1 mm | -11 mm |
| Jun | 21.5 °C | -1.5 °C | 0 mm | -2 mm |
| Jul | 22.5 °C | -2.9 °C | 0 mm | -1 mm |
| Aug | 24.6 °C | -0.7 °C | 0 mm | -1 mm |
| Sep | 24.3 °C | -0.6 °C | 4 mm | -0 mm |
| Oct | 20.9 °C | -1.2 °C | 25 mm | +8 mm |
| Nov | 18.0 °C | +0.5 °C | 90 mm | +46 mm |
| Dec | 15.3 °C | +1.1 °C | 47 mm | -21 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Hollister?
Hollister has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 13.4 °C and it receives 404 mm of precipitation per year.
What is the hottest day ever recorded in Hollister?
The hottest day measured in Hollister between 1940 and 2025 was 8 September 1944, reaching 40.0 °C.
What is the coldest day in Hollister?
The coldest day measured in Hollister between 1940 and 2025 was 22 December 1990, at -6.5 °C.
Does it snow in Hollister?
Almost never: Hollister sees virtually no snow, with about 10 frost days per year.
Has the climate of Hollister warmed?
Yes: Hollister warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hollister?
The wettest day measured in Hollister between 1940 and 2025 was 11 December 2014, with 77 mm of rain in 24 hours.
What was the windiest day in Hollister?
The windiest day measured in Hollister between 1940 and 2025 was 15 April 1976, with winds reaching 33.0 km/h.
What is the warmest month in Hollister?
The warmest month in Hollister is July (18.2 °C on average); the coldest is January (8.4 °C).
How much does it rain in Hollister?
Hollister receives on average 404 mm of precipitation per year, spread over about 48 rainy days.
Is it sunny in Hollister?
Hollister gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.
What is the biggest single-day snowfall in Hollister?
The heaviest 24-hour snowfall measured in Hollister between 1940 and 2025 was 3 January 1974, with 6.8 cm.
Are there tropical nights in Hollister?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Hollister.
What was the most extreme apparent temperature in Hollister?
In Hollister, between 1940 and 2025, the highest apparent temperature reached 41.5 °C on 4 August 1998, and the lowest was -10.4 °C on 22 December 1990.
Compare Hollister with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hollister