Blythe climate — normals and trends
Blythe (United States) has a hot desert climate (BWh) under the Köppen-Geiger classification. Its mean annual temperature is 23.5 °C and it receives 93 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 (35.1 °C on average) and the coldest is December (12.5 °C). Rainfall peaks in August.
Blythe averages 2 frost days, 186 hot days (≥ 30 °C) and 17 rainy days per year.
Blythe has warmed by +2.7 °C between 1940 and 2025, or +0.32 °C per decade. This trend is statistically significant.
The number of frost days there went from about 4 to 0 per year over the period.
The hottest day of the period reached 49.6 °C (on 20 June 2016) and the coldest -4.9 °C (on 14 January 1963).
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
BlytheCalifornia
- coords
- 33.61°, -114.60°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
23.5°C
Average daily high
30.0°C
Average daily low
16.9°C
Annual rainfall
93mm
Sunshine / day
11.4h
Mean relative humidity
30%
Average peak wind
16.6km/h
Seasonal range
22.6°C
Frost days (< 0 °C)
2 d/yr
Hot days (≥ 30 °C)
186 d/yr
Rainy days (≥ 1 mm)
17 d/yr
Annual snowfall
0.1 cm
Average feels-like high
27.7 °C
Average feels-like low
14.3 °C
Average peak gust
32.7 km/h
Tropical nights (≥ 20 °C)
142 d/yr
Solar radiation
21.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.75 · 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
49.6 °C
20 June 2016
Coldest day
-4.9 °C
14 January 1963
Wettest day
59 mm
6 October 1972
Windiest day
52.0 km/h
21 January 2010
Strongest gust
101.5 km/h
21 January 2010
Hottest feels-like
49.8 °C
29 June 2013
Coldest feels-like
-11.1 °C
13 January 1963
Snowiest day
2.2 cm
14 December 1967
Sunniest day
13.9 h
25 June 2025
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 | 19.1 °C | +0.1 °C | 2 mm | -10 mm |
| Feb | 25.4 °C | +3.7 °C | 0 mm | -12 mm |
| Mar | 25.9 °C | +1.0 °C | 11 mm | +2 mm |
| Apr | 29.6 °C | +0.5 °C | 0 mm | -4 mm |
| May | 34.4 °C | +0.7 °C | 7 mm | +6 mm |
| Jun | 40.3 °C | +1.4 °C | 5 mm | +4 mm |
| Jul | 41.5 °C | +0.1 °C | 2 mm | -6 mm |
| Aug | 42.4 °C | +1.9 °C | 11 mm | -1 mm |
| Sep | 36.8 °C | -0.7 °C | 9 mm | -0 mm |
| Oct | 32.1 °C | +1.0 °C | 4 mm | -3 mm |
| Nov | 25.4 °C | +1.7 °C | 39 mm | +32 mm |
| Dec | 23.1 °C | +4.4 °C | 2 mm | -10 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 Blythe?
Blythe has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 23.5 °C and it receives 93 mm of precipitation per year.
What is the hottest day ever recorded in Blythe?
The hottest day measured in Blythe between 1940 and 2025 was 20 June 2016, reaching 49.6 °C.
What is the coldest day in Blythe?
The coldest day measured in Blythe between 1940 and 2025 was 14 January 1963, at -4.9 °C.
Does it snow in Blythe?
Almost never: Blythe sees virtually no snow, with about 2 frost days per year.
Has the climate of Blythe warmed?
Yes: Blythe warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Blythe?
The wettest day measured in Blythe between 1940 and 2025 was 6 October 1972, with 59 mm of rain in 24 hours.
What was the windiest day in Blythe?
The windiest day measured in Blythe between 1940 and 2025 was 21 January 2010, with winds reaching 52.0 km/h.
What is the warmest month in Blythe?
The warmest month in Blythe is July (35.1 °C on average); the coldest is December (12.5 °C).
How much does it rain in Blythe?
Blythe receives on average 93 mm of precipitation per year, spread over about 17 rainy days.
Is it sunny in Blythe?
Blythe gets on average 11.4 hours of sunshine per day, roughly 4,161 hours per year over 1940-2025.
What is the biggest single-day snowfall in Blythe?
The heaviest 24-hour snowfall measured in Blythe between 1940 and 2025 was 14 December 1967, with 2.2 cm.
Are there tropical nights in Blythe?
Yes: Blythe has on average 142 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Blythe?
In Blythe, between 1940 and 2025, the highest apparent temperature reached 49.8 °C on 29 June 2013, and the lowest was -11.1 °C on 13 January 1963.
Compare Blythe with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Blythe