Susanville climate — normals and trends
Susanville (United States) has a warm-summer mediterranean continental climate (Dsb) under the Köppen-Geiger classification. Its mean annual temperature is 7.9 °C and it receives 610 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 (20.6 °C on average) and the coldest is January (-2.5 °C). Rainfall peaks in January.
Susanville averages 154 frost days, 31 hot days (≥ 30 °C) and 86 rainy days per year.
Susanville has warmed by +2.6 °C between 1940 and 2025, or +0.30 °C per decade. This trend is statistically significant.
The number of frost days there went from about 171 to 137 per year over the period.
The hottest day of the period reached 39.0 °C (on 10 July 2002) and the coldest -28.0 °C (on 21 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
SusanvilleCalifornia
- coords
- 40.42°, -120.65°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.9°C
Average daily high
14.4°C
Average daily low
2.0°C
Annual rainfall
610mm
Sunshine / day
10.5h
Mean relative humidity
61%
Average peak wind
13.2km/h
Seasonal range
23.1°C
Frost days (< 0 °C)
154 d/yr
Hot days (≥ 30 °C)
31 d/yr
Rainy days (≥ 1 mm)
86 d/yr
Annual snowfall
254.5 cm
Average feels-like high
11.6 °C
Average feels-like low
-1.1 °C
Average peak gust
38.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
18.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.6 °C
since 1940
+0.3 °C per decade · r² = 0.57 · 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
39.0 °C
10 July 2002
Coldest day
-28.0 °C
21 December 1990
Wettest day
93 mm
13 October 1962
Windiest day
36.8 km/h
12 October 1962
Strongest gust
124.2 km/h
12 October 1962
Hottest feels-like
39.5 °C
10 July 2002
Coldest feels-like
-33.2 °C
21 December 1990
Snowiest day
41.4 cm
23 March 1948
Sunniest day
14.4 h
1 July 2022
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 | 4.3 °C | +2.1 °C | 18 mm | -76 mm |
| Feb | 4.7 °C | +0.4 °C | 208 mm | +124 mm |
| Mar | 7.7 °C | +0.8 °C | 110 mm | +31 mm |
| Apr | 13.9 °C | +2.5 °C | 39 mm | -9 mm |
| May | 20.6 °C | +3.3 °C | 20 mm | -25 mm |
| Jun | 26.9 °C | +3.6 °C | 6 mm | -21 mm |
| Jul | 29.2 °C | +0.1 °C | 28 mm | +18 mm |
| Aug | 29.4 °C | +1.3 °C | 19 mm | +8 mm |
| Sep | 24.4 °C | +0.8 °C | 16 mm | -2 mm |
| Oct | 15.1 °C | -1.4 °C | 54 mm | +18 mm |
| Nov | 11.5 °C | +3.9 °C | 62 mm | -5 mm |
| Dec | 6.7 °C | +4.0 °C | 199 mm | +106 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 Susanville?
Susanville has a warm-summer mediterranean continental climate (Köppen Dsb). Over 1940-2025, the average annual temperature is 7.9 °C and it receives 610 mm of precipitation per year.
What is the hottest day ever recorded in Susanville?
The hottest day measured in Susanville between 1940 and 2025 was 10 July 2002, reaching 39.0 °C.
What is the coldest day in Susanville?
The coldest day measured in Susanville between 1940 and 2025 was 21 December 1990, at -28.0 °C.
Does it snow in Susanville?
Yes. Susanville gets on average 254.5 cm of snow per year and has around 154 frost days.
Has the climate of Susanville warmed?
Yes: Susanville warmed by +2.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Susanville?
The wettest day measured in Susanville between 1940 and 2025 was 13 October 1962, with 93 mm of rain in 24 hours.
What was the windiest day in Susanville?
The windiest day measured in Susanville between 1940 and 2025 was 12 October 1962, with winds reaching 36.8 km/h.
What is the warmest month in Susanville?
The warmest month in Susanville is July (20.6 °C on average); the coldest is January (-2.5 °C).
How much does it rain in Susanville?
Susanville receives on average 610 mm of precipitation per year, spread over about 86 rainy days.
Is it sunny in Susanville?
Susanville gets on average 10.5 hours of sunshine per day, roughly 3,833 hours per year over 1940-2025.
What is the biggest single-day snowfall in Susanville?
The heaviest 24-hour snowfall measured in Susanville between 1940 and 2025 was 23 March 1948, with 41.4 cm.
Are there tropical nights in Susanville?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Susanville.
What was the most extreme apparent temperature in Susanville?
In Susanville, between 1940 and 2025, the highest apparent temperature reached 39.5 °C on 10 July 2002, and the lowest was -33.2 °C on 21 December 1990.
Compare Susanville with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Susanville