For the most comfortable weather in Nairobi, aim for June – September and December & January. January tops our comfort score at 92/100, with highs around 81°F (27°C) and 1.5 in (39 mm) of rain. February & March and October are good shoulder-season months. The toughest months are April & May and November, mainly because of cloud cover.
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. The grid cell sits at about 1,642 m (5,387 ft), close to Nairobi's own ~1,661 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
How we pick the best months
Temperature (40 pts): full marks for average daytime highs of 64–81°F (18–27°C); minus 3 points per °C below and 4 per °C above.
Rain (25 pts): full marks up to 40 mm (1.6 in) a month, falling to zero at 250 mm (9.8 in).
Humidity (15 pts): only counts when it is warm (mean above 18°C); minus 0.75 points per % above 70% relative humidity.
Cloud (20 pts): full marks at 30% cloud cover or less, falling to zero at 90%.
Best months: within 6 points of the top (or 85+). Shoulder: within 18 and at least 45. Toughest: within 6 of the lowest. Comfort only; crowds, prices, festivals and openings aren't scored.
Nairobi season by season
Temperatures barely move through the year in Nairobi (highs stay between 77°F and 84°F), so rain is what really separates the seasons.
Drier months Jan & Feb and Jun – Sep
Expect steady highs of 77–84°F (25–29°C). It's the driest half, with only about 5.9 in (151 mm) of rain, 25% of the year's total. Comfort peaks here: January and June – September rank with the year's best, and the season averages 88/100.
Wetter months Mar – May and Oct – Dec
Temperatures hold fairly even, with highs of 77–83°F (25–28°C). It's the wettest half, with about 17.7 in (450 mm) of rain, 75% of the year's total. Lows bottom out around 56°F (13°C). December is among the best-scoring months (season average 81/100).
What our curated routes say
Our curated Kenya & Tanzania Safari route recommends Jun – Oct. That lines up with the climate data here: June – October are among the better-scoring months.
Plan by month
By comfort score: 12 Great. Tap a month for its own guide.
For the most comfortable weather in Nairobi, aim for June – September and December & January. January tops our comfort score at 92/100, with highs around 81°F (27°C) and 1.5 in (39 mm) of rain. February & March and October are good shoulder-season months. The toughest months are April & May and November, mainly because of cloud cover.
What is the rainiest month in Nairobi?
April is the wettest month, averaging about 4.5 in (114 mm) of rain. July is the driest, with about 0.6 in (16 mm). The yearly total is around 23.7 in (601 mm).
What is the coldest month in Nairobi?
July is the coldest, with average lows of 53°F (12°C) and highs of 78°F (25°C). The warmest is February, with average highs of 84°F (29°C).
Is Nairobi humid?
Not especially for the tropics: humidity averages 66% over the year, and no month pairs warm temperatures with 75%+ humidity.
When is the rainy season in Nairobi?
The wettest three-month stretch is March – May, with about 9.9 in (251 mm) of rain combined. The driest stretch is July – September, with about 2.3 in (58 mm).