Isaka in Summer
In summer (December, January and February), Isaka sees average daytime highs around 28°C and overnight lows near 19°C, with 341 mm of rain over about 51 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 28°C. The sky is clear or mostly clear about 19% of the time across summer, and the air most often feels humid.
Summer is Isaka's 3rd-best season to visit on our travel score. For the whole year in context, see Isaka's year-round climate.
- Avg daytime high
- 28°C
- coldest season of the year
- Avg overnight low
- 19°C
- Rainfall
- 341 mm
- 51 wet days
- Avg wind
- 6 km/h
- Travel score
- 4.8
- 3rd-best season
- Months
- Dec · Jan · Feb
Temperature in Isaka in Summer
Across summer, daytime highs hold fairly steady around 28°C.
A typical summer day in Isaka reaches about 28°C and drops to 19°C overnight. The warmest of the three months is February, the coolest January.
How summer really feels in Isaka
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Isaka weather by month
How the three summer months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 28° / 19° | 119 | 18.1 | 12.2 | 4.9 |
| Feb | 29° / 19° | 93 | 14.5 | 12.1 | 4.7 |
| Mar | 29° / 19° | 118 | 16.4 | 12 | 4.7 |
| Apr | 28° / 19° | 98 | 13.5 | 11.9 | 5.2 |
| May | 29° / 19° | 20 | 3.9 | 11.8 | 6.2 |
| Jun | 29° / 19° | 2 | 0.4 | 11.8 | 6.5 |
| Jul | 29° / 18° | 0 | 0.1 | 11.8 | 6.9 |
| Aug | 30° / 19° | 3 | 0.6 | 11.9 | 6.1 |
| Sep | 32° / 20° | 7 | 1.3 | 12 | 5.2 |
| Oct | 32° / 20° | 27 | 5.1 | 12.1 | 4.5 |
| Nov | 30° / 20° | 103 | 13.3 | 12.2 | 4.5 |
| Dec | 28° / 19° | 130 | 18.5 | 12.2 | 4.8 |
Cloud cover in Summer
The sky is clear or mostly clear about 19% of the time across summer.
Chance of precipitation in Summer
Isaka gets around 341 mm of rain over 51 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 6 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 12 min in early December to 12 h 06 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.0 kWh/m².
Hazard calendar for Isaka
In summer, Isaka overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Isaka's rainy season runs November–April, when most of the year's rain falls.
Is summer a good time to visit Isaka?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Isaka for sightseeing.
What to pack for Isaka in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Isaka sees daytime highs around 28°C and nights near 19°C. Pack light clothes, rain gear and sun protection. About 51 days see rain.
UV index in Isaka in Summer
Clear-sky midday UV across summer averages around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Isaka peaks around March 10 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 17 at about 10 (extreme).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 13 | 16 | 16 | 15 | 12 | 10 | 11 | 11 | 13 | 14 | 13 | 13 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 16 | Extreme |
| Mar | 16 | Extreme |
| Apr | 15 | Extreme |
| May | 12 | Extreme |
| Jun | 10 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 13 | Extreme |
| Oct | 14 | Extreme |
| Nov | 13 | Extreme |
| Dec | 13 | Extreme |
Air quality in Isaka in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Isaka is worst in January — around 17 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (May, 8 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 17 | 15 | 12 | 10 | 8 | 8 | 10 | 11 | 11 | 10 | 11 | 13 |
| Level | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good | Good | Good | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 17 | Moderate |
| Feb | 15 | Moderate |
| Mar | 12 | Moderate |
| Apr | 10 | Good |
| May | 8 | Good |
| Jun | 8 | Good |
| Jul | 10 | Good |
| Aug | 11 | Good |
| Sep | 11 | Good |
| Oct | 10 | Good |
| Nov | 11 | Good |
| Dec | 13 | Moderate |
Where is Isaka?
Isaka sits at 3.9°S, 32.9°E, 1,201 m above sea level, in Tanzania. The nearest listed city is Tinde, 30 km away.
Topography around Isaka
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Isaka.
Within 3 km, the terrain around Isaka has only modest variations in elevation — a maximum elevation change of 34 m around an average of 1,187 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 228 m; within 80 km, significant variations in elevation — a maximum elevation change of 502 m.
The land around Isaka is covered by cropland (85%) within 3 km, cropland (86%) within 16 km, and cropland (75%) within 80 km.
Tanzania travel facts
- Travel advisory
- Level 3
- Reconsider Travel
- Power plugs
- Type D / G
- 230 V · 50 Hz
- Prices
- ≈ 29% of US
- price level, 2025
- GDP per capita
- $1,319
- 2025
- Happiness
- 3.9 / 10
- World Happiness, 2025
- Safe drinking water
- 31%
- of population, 2024
- Homicide rate
- 3.7
- per 100k, 2020
- Road deaths
- 31.1
- per 100k/yr, 2019
- Income group
- Lower middle
- World Bank
- English
- Low
- EF EPI 479
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Isaka (-3.9°, 32.9333°, elevation 1,201 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.