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Arusha, Tanzania climate
Aw Tropical savanna (dry winter)
Arusha has a remarkably steady warm-temperate climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is February with an average daily high near 89°F, while the coldest is July averaging around 56°F at night. Precipitation totals about 31 inches a year and is strongly seasonal — April alone averages 6.2 inches while September barely receives 0.47 inches.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Arusha climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 88 | 89 | 87 | 83 | 79 | 78 | 79 | 82 | 85 | 87 | 86 | 86 |
| Avg temp (°F) | 76 | 77 | 76 | 73 | 70 | 68 | 68 | 69 | 72 | 74 | 74 | 75 |
| Avg low (°F) | 64 | 64 | 65 | 64 | 61 | 57 | 56 | 57 | 59 | 61 | 63 | 64 |
| Precipitation (in) | 3.0 | 2.7 | 5.2 | 6.2 | 3.2 | 0.8 | 0.6 | 0.6 | 0.5 | 1.3 | 3.5 | 3.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 88 | 89 | 87 | 83 | 79 | 78 |
| Avg temp (°F) | 76 | 77 | 76 | 73 | 70 | 68 |
| Avg low (°F) | 64 | 64 | 65 | 64 | 61 | 57 |
| Precipitation (in) | 3.0 | 2.7 | 5.2 | 6.2 | 3.2 | 0.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 79 | 82 | 85 | 87 | 86 | 86 |
| Avg temp (°F) | 68 | 69 | 72 | 74 | 74 | 75 |
| Avg low (°F) | 56 | 57 | 59 | 61 | 63 | 64 |
| Precipitation (in) | 0.6 | 0.6 | 0.5 | 1.3 | 3.5 | 3.8 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with high ≥ 90°F (days) | 13 | 14 | 10 | 0.9 | — | — | — | 0.0 | 0.8 | 4 | 2 | 6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with high ≥ 90°F (days) | 13 | 14 | 10 | 0.9 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with high ≥ 90°F (days) | — | 0.0 | 0.8 | 4 | 2 | 6 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 56 | 56 | 65 | 72 | 65 | 60 | 56 | 54 | 45 | 53 | 65 | 62 |
| Relative humidity (%) | 62 | 60 | 67 | 77 | 80 | 75 | 70 | 65 | 61 | 61 | 69 | 69 |
| Wind speed (mph) | 3.4 | 3.5 | 4.7 | 6.3 | 6.6 | 6.2 | 6.8 | 7.9 | 9.0 | 9.0 | 6.8 | 4.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 56 | 56 | 65 | 72 | 65 | 60 |
| Relative humidity (%) | 62 | 60 | 67 | 77 | 80 | 75 |
| Wind speed (mph) | 3.4 | 3.5 | 4.7 | 6.3 | 6.6 | 6.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 56 | 54 | 45 | 53 | 65 | 62 |
| Relative humidity (%) | 70 | 65 | 61 | 61 | 69 | 69 |
| Wind speed (mph) | 6.8 | 7.9 | 9.0 | 9.0 | 6.8 | 4.2 |
Methodology & sources
Temperature & precipitation — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.