Fillmore climate — normals and trends
Fillmore (United States) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 14.8 °C and it receives 396 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 (22.7 °C on average) and the coldest is January (8.1 °C). Rainfall peaks in February.
Fillmore averages 12 frost days, 40 hot days (≥ 30 °C) and 40 rainy days per year.
Fillmore has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The number of frost days there went from about 22 to 2 per year over the period.
The hottest day of the period reached 41.0 °C (on 6 September 2020) and the coldest -7.8 °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
FillmoreCalifornia
- coords
- 34.40°, -118.92°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.8°C
Average daily high
21.1°C
Average daily low
9.4°C
Annual rainfall
396mm
Sunshine / day
11.3h
Mean relative humidity
53%
Average peak wind
9.7km/h
Seasonal range
14.6°C
Frost days (< 0 °C)
12 d/yr
Hot days (≥ 30 °C)
40 d/yr
Rainy days (≥ 1 mm)
40 d/yr
Annual snowfall
20.1 cm
Average feels-like high
20.2 °C
Average feels-like low
7.0 °C
Average peak gust
35.1 km/h
Tropical nights (≥ 20 °C)
6 d/yr
Solar radiation
20.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.51 · 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
41.0 °C
6 September 2020
Coldest day
-7.8 °C
22 December 1990
Wettest day
129 mm
24 December 2025
Windiest day
28.5 km/h
9 December 1943
Strongest gust
99.4 km/h
8 February 1993
Hottest feels-like
41.4 °C
6 July 1989
Coldest feels-like
-12.7 °C
4 January 1949
Snowiest day
29.2 cm
4 January 1974
Sunniest day
14.0 h
30 May 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 | 15.5 °C | +1.5 °C | 13 mm | -63 mm |
| Feb | 16.9 °C | +2.2 °C | 80 mm | -4 mm |
| Mar | 15.2 °C | -0.9 °C | 70 mm | +1 mm |
| Apr | 18.0 °C | -0.9 °C | 15 mm | -16 mm |
| May | 22.1 °C | +0.1 °C | 12 mm | +1 mm |
| Jun | 25.9 °C | 0.0 °C | 0 mm | -3 mm |
| Jul | 26.9 °C | -2.2 °C | 0 mm | -2 mm |
| Aug | 28.9 °C | -0.2 °C | 1 mm | -2 mm |
| Sep | 25.5 °C | -1.7 °C | 34 mm | +26 mm |
| Oct | 22.0 °C | -1.1 °C | 48 mm | +32 mm |
| Nov | 18.4 °C | +0.3 °C | 138 mm | +102 mm |
| Dec | 17.8 °C | +3.2 °C | 207 mm | +149 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 Fillmore?
Fillmore has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 14.8 °C and it receives 396 mm of precipitation per year.
What is the hottest day ever recorded in Fillmore?
The hottest day measured in Fillmore between 1940 and 2025 was 6 September 2020, reaching 41.0 °C.
What is the coldest day in Fillmore?
The coldest day measured in Fillmore between 1940 and 2025 was 22 December 1990, at -7.8 °C.
Does it snow in Fillmore?
Yes. Fillmore gets on average 20.1 cm of snow per year and has around 12 frost days.
Has the climate of Fillmore warmed?
Yes: Fillmore warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Fillmore?
The wettest day measured in Fillmore between 1940 and 2025 was 24 December 2025, with 129 mm of rain in 24 hours.
What was the windiest day in Fillmore?
The windiest day measured in Fillmore between 1940 and 2025 was 9 December 1943, with winds reaching 28.5 km/h.
What is the warmest month in Fillmore?
The warmest month in Fillmore is July (22.7 °C on average); the coldest is January (8.1 °C).
How much does it rain in Fillmore?
Fillmore receives on average 396 mm of precipitation per year, spread over about 40 rainy days.
Is it sunny in Fillmore?
Fillmore gets on average 11.3 hours of sunshine per day, roughly 4,125 hours per year over 1940-2025.
What is the biggest single-day snowfall in Fillmore?
The heaviest 24-hour snowfall measured in Fillmore between 1940 and 2025 was 4 January 1974, with 29.2 cm.
Are there tropical nights in Fillmore?
Yes: Fillmore has on average 6 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Fillmore?
In Fillmore, between 1940 and 2025, the highest apparent temperature reached 41.4 °C on 6 July 1989, and the lowest was -12.7 °C on 4 January 1949.
Compare Fillmore with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Fillmore