Climate Overview
The climate in Nioro is hot. The average annual temperature is 30°C and approximately 415mm of precipitation falls per year. August is the wettest month, receiving around 165mm of rainfall. Nioro is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: May, April, June. The coldest months are December, February, January, when temperatures can drop to 19°C.
Temperature
Temperatures in Nioro vary considerably across the year, with a 24°C difference between the coldest and warmest months. May is the hottest month, with daytime highs reaching 43°C and an average of 37°C. December is the coolest month, with minimum temperatures around 19°C and an average of 25°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between March and April, with a 6°C shift in average temperatures.
Precipitation
Nioro is a relatively dry area, receiving approximately 415mm of precipitation annually, which averages out to around 35mm per month. The wettest month is August, averaging 165mm of rainfall. July and September also tend to see above-average precipitation. The driest month is February, with just 0mm. That's 165mm less than August, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
Nioro is relatively calm, with an average annual wind speed of 3km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.
Seasons
52 days until Autumn
It is currently summer in Nioro, which began on June 21, 2026. Nioro is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in May at around 43°C, while the coldest stretch bottoms out in December near 19°C. Autumn is next, beginning on September 23, 2026 — 52 days from now.
Spring
Temperatures range from 21 to 43°C. Precipitation is minimal, with only around 1mm for the entire season. Winds are generally light, averaging 3km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 25 to 41°C. Precipitation is moderate at around 300mm for the season, averaging 100mm per month. Winds are generally light, averaging 3km/h. Stay hydrated, wear sun protection, and seek shade during the hottest hours of the day.
Autumn
Temperatures range from 20 to 38°C. Rainfall is relatively light, with around 111mm over the season and a monthly average of 37mm. Winds are generally light, averaging 3km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from 19 to 34°C. Precipitation is minimal, with only around 3mm for the entire season. Winds are generally light, averaging 4km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Nioro based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
