Isaka climate — normals and trends
Isaka (Tanzania) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 23.2 °C and it receives 870 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 October (25.3 °C on average) and the coldest is January (22.1 °C). Rainfall peaks in December.
Isaka averages 0 frost days, 109 hot days (≥ 30 °C) and 124 rainy days per year.
Isaka has warmed by +1.8 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The hottest day of the period reached 35.9 °C (on 11 February 2006) and the coldest 12.3 °C (on 3 July 1973).
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
IsakaShinyanga
- coords
- -3.90°, 32.93°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
23.2°C
Average daily high
28.7°C
Average daily low
18.5°C
Annual rainfall
870mm
Sunshine / day
11.1h
Mean relative humidity
60%
Average peak wind
14.2km/h
Seasonal range
3.2°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
109 d/yr
Rainy days (≥ 1 mm)
124 d/yr
Annual snowfall
0.0 cm
Average feels-like high
30.2 °C
Average feels-like low
18.5 °C
Average peak gust
31.8 km/h
Tropical nights (≥ 20 °C)
55 d/yr
Solar radiation
22.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.53 · 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
35.9 °C
11 February 2006
Coldest day
12.3 °C
3 July 1973
Wettest day
112 mm
7 April 2012
Windiest day
29.9 km/h
19 July 1953
Strongest gust
60.1 km/h
6 May 2014
Hottest feels-like
37.7 °C
2 February 2010
Coldest feels-like
9.5 °C
20 June 2007
Sunniest day
12.2 h
28 November 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 | 28.8 °C | +1.6 °C | 84 mm | -47 mm |
| Feb | 30.8 °C | +3.0 °C | 39 mm | -79 mm |
| Mar | 29.4 °C | +1.5 °C | 172 mm | +28 mm |
| Apr | 28.6 °C | +1.3 °C | 88 mm | -36 mm |
| May | 29.1 °C | +1.0 °C | 21 mm | -7 mm |
| Jun | 29.2 °C | +0.5 °C | 2 mm | 0 mm |
| Jul | 28.7 °C | 0.0 °C | 0 mm | -1 mm |
| Aug | 29.4 °C | -0.4 °C | 2 mm | -1 mm |
| Sep | 32.0 °C | +0.9 °C | 2 mm | -6 mm |
| Oct | 31.5 °C | +0.2 °C | 35 mm | +3 mm |
| Nov | 31.7 °C | +2.8 °C | 22 mm | -103 mm |
| Dec | 29.4 °C | +2.1 °C | 118 mm | -38 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 Isaka?
Isaka has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 23.2 °C and it receives 870 mm of precipitation per year.
What is the hottest day ever recorded in Isaka?
The hottest day measured in Isaka between 1940 and 2025 was 11 February 2006, reaching 35.9 °C.
What is the coldest day in Isaka?
The coldest day measured in Isaka between 1940 and 2025 was 3 July 1973, at 12.3 °C.
Does it snow in Isaka?
Almost never: Isaka sees virtually no snow, with about 0 frost days per year.
Has the climate of Isaka warmed?
Yes: Isaka warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Isaka?
The wettest day measured in Isaka between 1940 and 2025 was 7 April 2012, with 112 mm of rain in 24 hours.
What was the windiest day in Isaka?
The windiest day measured in Isaka between 1940 and 2025 was 19 July 1953, with winds reaching 29.9 km/h.
What is the warmest month in Isaka?
The warmest month in Isaka is October (25.3 °C on average); the coldest is January (22.1 °C).
How much does it rain in Isaka?
Isaka receives on average 870 mm of precipitation per year, spread over about 124 rainy days.
Is it sunny in Isaka?
Isaka gets on average 11.1 hours of sunshine per day, roughly 4,052 hours per year over 1940-2025.
Are there tropical nights in Isaka?
Yes: Isaka has on average 55 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Isaka?
In Isaka, between 1940 and 2025, the highest apparent temperature reached 37.7 °C on 2 February 2010, and the lowest was 9.5 °C on 20 June 2007.
Compare Isaka with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Isaka