Highland climate — normals and trends
Highland (United States) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 15.2 °C and it receives 311 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 (24.5 °C on average) and the coldest is January (7.4 °C). Rainfall peaks in February.
Highland averages 16 frost days, 75 hot days (≥ 30 °C) and 43 rainy days per year.
Highland 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 28 to 4 per year over the period.
The hottest day of the period reached 41.9 °C (on 6 September 2020) and the coldest -10.3 °C (on 24 January 1949).
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
HighlandCalifornia
- coords
- 34.13°, -117.21°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.2°C
Average daily high
21.8°C
Average daily low
9.6°C
Annual rainfall
311mm
Sunshine / day
11.4h
Mean relative humidity
50%
Average peak wind
11.9km/h
Seasonal range
17.1°C
Frost days (< 0 °C)
16 d/yr
Hot days (≥ 30 °C)
75 d/yr
Rainy days (≥ 1 mm)
43 d/yr
Annual snowfall
16.6 cm
Average feels-like high
19.9 °C
Average feels-like low
7.4 °C
Average peak gust
34.5 km/h
Tropical nights (≥ 20 °C)
18 d/yr
Solar radiation
20.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.6 °C
since 1940
+0.3 °C per decade · r² = 0.64 · 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
41.9 °C
6 September 2020
Coldest day
-10.3 °C
24 January 1949
Wettest day
75 mm
29 November 1970
Windiest day
34.6 km/h
16 March 1964
Strongest gust
90.7 km/h
28 February 2014
Hottest feels-like
41.7 °C
6 July 2018
Coldest feels-like
-15.0 °C
14 February 1949
Snowiest day
25.1 cm
31 January 1979
Sunniest day
14.0 h
13 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 | 14.4 °C | +1.3 °C | 16 mm | -38 mm |
| Feb | 17.8 °C | +3.7 °C | 58 mm | -1 mm |
| Mar | 16.2 °C | +0.3 °C | 63 mm | +15 mm |
| Apr | 20.1 °C | +0.7 °C | 15 mm | -9 mm |
| May | 24.9 °C | +1.6 °C | 12 mm | +3 mm |
| Jun | 30.3 °C | +2.0 °C | 2 mm | -0 mm |
| Jul | 31.7 °C | -0.2 °C | 4 mm | -8 mm |
| Aug | 33.3 °C | +1.9 °C | 10 mm | -4 mm |
| Sep | 28.4 °C | -0.5 °C | 26 mm | +17 mm |
| Oct | 24.2 °C | +0.7 °C | 27 mm | +15 mm |
| Nov | 19.4 °C | +1.8 °C | 93 mm | +67 mm |
| Dec | 18.3 °C | +4.6 °C | 66 mm | +23 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 Highland?
Highland has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 15.2 °C and it receives 311 mm of precipitation per year.
What is the hottest day ever recorded in Highland?
The hottest day measured in Highland between 1940 and 2025 was 6 September 2020, reaching 41.9 °C.
What is the coldest day in Highland?
The coldest day measured in Highland between 1940 and 2025 was 24 January 1949, at -10.3 °C.
Does it snow in Highland?
Yes. Highland gets on average 16.6 cm of snow per year and has around 16 frost days.
Has the climate of Highland warmed?
Yes: Highland warmed by +2.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Highland?
The wettest day measured in Highland between 1940 and 2025 was 29 November 1970, with 75 mm of rain in 24 hours.
What was the windiest day in Highland?
The windiest day measured in Highland between 1940 and 2025 was 16 March 1964, with winds reaching 34.6 km/h.
What is the warmest month in Highland?
The warmest month in Highland is July (24.5 °C on average); the coldest is January (7.4 °C).
How much does it rain in Highland?
Highland receives on average 311 mm of precipitation per year, spread over about 43 rainy days.
Is it sunny in Highland?
Highland 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 Highland?
The heaviest 24-hour snowfall measured in Highland between 1940 and 2025 was 31 January 1979, with 25.1 cm.
Are there tropical nights in Highland?
Yes: Highland has on average 18 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Highland?
In Highland, between 1940 and 2025, the highest apparent temperature reached 41.7 °C on 6 July 2018, and the lowest was -15.0 °C on 14 February 1949.
Compare Highland with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Highland