Geiro in Summer
In summer (December, January and February), Geiro sees average daytime highs around 26°C and overnight lows near 17°C, with 522 mm of rain over about 57 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 26°C. The sky is clear or mostly clear about 17% of the time across summer, and the air most often feels humid.
Summer is Geiro's 3rd-best season to visit on our travel score. For the whole year in context, see Geiro's year-round climate.
- Avg daytime high
- 26°C
- warmest season of the year
- Avg overnight low
- 17°C
- Rainfall
- 522 mm
- 57 wet days
- Avg wind
- 7 km/h
- Travel score
- 5.2
- 3rd-best season
- Months
- Dec · Jan · Feb
Temperature in Geiro in Summer
Across summer, daytime highs hold fairly steady around 26°C.
A typical summer day in Geiro reaches about 26°C and drops to 17°C overnight. The warmest of the three months is December, the coolest February.
Geiro 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 | 26° / 18° | 199 | 20.8 | 12.3 | 5.0 |
| Feb | 26° / 17° | 163 | 16.8 | 12.2 | 5.2 |
| Mar | 26° / 18° | 169 | 22.5 | 12 | 4.8 |
| Apr | 24° / 17° | 116 | 23.7 | 11.9 | 4.6 |
| May | 23° / 16° | 57 | 15.8 | 11.7 | 6.0 |
| Jun | 22° / 14° | 17 | 6.7 | 11.7 | 7.2 |
| Jul | 22° / 13° | 12 | 4.7 | 11.7 | 7.4 |
| Aug | 23° / 13° | 16 | 6.2 | 11.8 | 7.4 |
| Sep | 24° / 14° | 11 | 3.9 | 12 | 8.0 |
| Oct | 26° / 15° | 26 | 7.7 | 12.1 | 7.3 |
| Nov | 26° / 17° | 66 | 12.4 | 12.3 | 6.3 |
| Dec | 26° / 18° | 160 | 18.9 | 12.4 | 5.3 |
Cloud cover in Summer
The sky is clear or mostly clear about 17% of the time across summer.
Chance of precipitation in Summer
Geiro gets around 522 mm of rain over 57 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 7 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 18 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 6.1 kWh/m².
Hazard calendar for Geiro
In summer, Geiro overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
Geiro's monsoon runs December–April, when most of the year's rain falls.
Is summer a good time to visit Geiro?
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 Geiro for sightseeing.
What to pack for Geiro in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Geiro sees daytime highs around 26°C and nights near 17°C. Pack rain gear and sun protection. Worth having: light clothes. About 57 days see rain.
UV index in Geiro 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 Geiro peaks around March 11 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) | 15 | 16 | 16 | 15 | 11 | 10 | 11 | 11 | 14 | 14 | 13 | 13 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 16 | Extreme |
| Mar | 16 | Extreme |
| Apr | 15 | Extreme |
| May | 11 | Extreme |
| Jun | 10 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 14 | Extreme |
| Oct | 14 | Extreme |
| Nov | 13 | Extreme |
| Dec | 13 | Extreme |
Where is Geiro?
Geiro sits at 6.2°S, 36.9°E, 1,284 m above sea level, in Tanzania. The nearest listed city is Kibaigwa, 26 km away.
Topography around Geiro
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Geiro.
Within 3 km, the terrain around Geiro has significant variations in elevation — a maximum elevation change of 458 m around an average of 1,295 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 845 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,016 m.
The land around Geiro is covered by cropland (69%) within 3 km, cropland (71%) within 16 km, and cropland (36%), trees (26%) and shrubs (25%) 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 Geiro (-6.15°, 36.8667°, elevation 1,284 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.