Athi River Weather in September

September in Athi River sees daytime temperatures around 26°C (79°F) and lows of 14°C (57°F) at night. As the driest month of the year, combined with excellent weather, it's a great time to visit.

Rainfall in Athi River in September

Expect fewer clouds and less rain as the month goes on. This makes it an ideal time for outdoor activities. The climate data from previous years indicates about 4 days of rain, averaging 17 mm (0.7 in) for the month. Rain is scarce this month and when it does fall, it tends to be light. Unlikely to disrupt plans significantly.

Temperature in Athi River in September

Athi River in September has excellent weather. Days reach 26°C (79°F) and nights cool to 14°C (57°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 14°C (57°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Athi River in September

You can expect a moderate amount of sunlight, with approximately 171 hours. This means a pleasant mix of sun and overcast.

Wind Speed in Athi River in September

September has wind speeds averaging 3 m/s (6 knots). You can expect comfortable light winds that steadily move flags and feel mild throughout the day. Since this is an average, daily conditions vary from gentle winds to more active breezes.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Athi River.

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• January
• February
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• May
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• October
• November
• December

For a detailed overview over the year and the best time to visit Kenya, check out our Athi River's climate page.

Athi River Temperature in September

Min Temperature 14°C (57°F)  

Max Temperature 26°C (79°F)  

Chance of Rain 13%  

Precipitation 17 mm (0.7 in)  

Rainy days 4 days  

Humidity 67% *  

Windspeed 3 m/s (6 knots) *  

Sunshine 171 hours *  

Percentage Sunshine *  

* Data from: Nairobi, Kenya (16 KM, 10 Miles).

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Athi River typically stay consistent throughout September, with daily highs averaging around 26°C (79°F). Nights are cool, with lows around 13°C (55°F).

Average temperatures in September

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Historical weather for Athi River in September

Browse day-by-day weather records for Athi River spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Athi River historical weather extremes in September

According to our 49 years of weather records for Athi River, the following extremes were recorded between 1976 and 2025.

• The hottest September day on record in Athi River reached 31°C (88°F) (September 25, 2007).
• On September 2, 1976, Athi River saw its coldest September day with temperatures maxing out at 12°C (54°F).
• Nighttime temperatures dropped to 6°C (43°F) on September 23, 1983, marking the coldest September night on record.

What to Wear in Athi River in September

Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. With minimal rainfall expected, you can leave the rain gear at home. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Athi River in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

8/10

Walking

8/10

Camping

10/10

Outdoor sports

8/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Kenya, check out our Athi River's climate page.

More climate data for Athi River

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Athi River climate overview or explore weather in Kenya.