Hennenman climate — normals and trends
Hennenman (South Africa) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 16.7 °C and it receives 666 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 January (22.3 °C on average) and the coldest is June (9.0 °C). Rainfall peaks in January.
Hennenman averages 16 frost days, 57 hot days (≥ 30 °C) and 94 rainy days per year.
Hennenman has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.
The hottest day of the period reached 40.0 °C (on 6 January 2016) and the coldest -6.6 °C (on 26 June 1992).
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
HennenmanFree State
- coords
- -27.98°, 27.02°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.7°C
Average daily high
24.3°C
Average daily low
10.5°C
Annual rainfall
666mm
Sunshine / day
11.0h
Mean relative humidity
57%
Average peak wind
17.7km/h
Seasonal range
13.3°C
Frost days (< 0 °C)
16 d/yr
Hot days (≥ 30 °C)
57 d/yr
Rainy days (≥ 1 mm)
94 d/yr
Annual snowfall
0.2 cm
Average feels-like high
22.9 °C
Average feels-like low
8.3 °C
Average peak gust
36.0 km/h
Tropical nights (≥ 20 °C)
3 d/yr
Solar radiation
20.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.25 · 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
6 January 2016
Coldest day
-6.6 °C
26 June 1992
Wettest day
94 mm
7 November 1948
Windiest day
51.8 km/h
31 October 1985
Strongest gust
89.3 km/h
23 August 2011
Hottest feels-like
40.0 °C
29 January 1983
Coldest feels-like
-10.9 °C
26 June 1992
Snowiest day
8.8 cm
7 July 1996
Sunniest day
13.8 h
13 December 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 | 31.0 °C | +2.1 °C | 56 mm | -53 mm |
| Feb | 29.5 °C | +1.7 °C | 81 mm | -14 mm |
| Mar | 26.7 °C | +0.3 °C | 108 mm | +28 mm |
| Apr | 21.7 °C | -1.7 °C | 232 mm | +176 mm |
| May | 21.3 °C | +0.8 °C | 2 mm | -19 mm |
| Jun | 18.6 °C | +1.1 °C | 12 mm | +1 mm |
| Jul | 18.9 °C | +1.1 °C | 12 mm | +4 mm |
| Aug | 23.1 °C | +2.3 °C | 20 mm | +6 mm |
| Sep | 25.9 °C | +1.0 °C | 51 mm | +30 mm |
| Oct | 27.1 °C | +0.3 °C | 67 mm | +4 mm |
| Nov | 25.4 °C | -2.3 °C | 134 mm | +49 mm |
| Dec | 28.2 °C | -0.5 °C | 106 mm | +2 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 Hennenman?
Hennenman has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 16.7 °C and it receives 666 mm of precipitation per year.
What is the hottest day ever recorded in Hennenman?
The hottest day measured in Hennenman between 1940 and 2025 was 6 January 2016, reaching 40.0 °C.
What is the coldest day in Hennenman?
The coldest day measured in Hennenman between 1940 and 2025 was 26 June 1992, at -6.6 °C.
Does it snow in Hennenman?
Almost never: Hennenman sees virtually no snow, with about 16 frost days per year.
Has the climate of Hennenman warmed?
Yes: Hennenman warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hennenman?
The wettest day measured in Hennenman between 1940 and 2025 was 7 November 1948, with 94 mm of rain in 24 hours.
What was the windiest day in Hennenman?
The windiest day measured in Hennenman between 1940 and 2025 was 31 October 1985, with winds reaching 51.8 km/h.
What is the warmest month in Hennenman?
The warmest month in Hennenman is January (22.3 °C on average); the coldest is June (9.0 °C).
How much does it rain in Hennenman?
Hennenman receives on average 666 mm of precipitation per year, spread over about 94 rainy days.
Is it sunny in Hennenman?
Hennenman gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.
What is the biggest single-day snowfall in Hennenman?
The heaviest 24-hour snowfall measured in Hennenman between 1940 and 2025 was 7 July 1996, with 8.8 cm.
Are there tropical nights in Hennenman?
Yes: Hennenman has on average 3 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Hennenman?
In Hennenman, between 1940 and 2025, the highest apparent temperature reached 40.0 °C on 29 January 1983, and the lowest was -10.9 °C on 26 June 1992.
Compare Hennenman with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hennenman