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Hourly Forecast
Daylight Hours
06:56
Sunrise
19:10
Sunset
Moon
Waxing Crescent
11:40
Moonrise
20:47
Moonset
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Weather in Gaithersburg today, September 15, 2026
Conditions in Gaithersburg on September 15, 2026 favour clear skies, so the day opens with a fine, sunny outlook. Any interruptions to the blue should be brief rather than lasting.
Temperatures climb from an overnight low near 10°C toward a daytime high of about 26°C. Expect humidity between 27% and 61%, most humid near 23:00. Winds stay light, near 3.3 km/h by 21:00, so the day feels still more than breezy.
Afternoon conditions open up, holding cloud close to 0% near 14:00. The day finishes on a milder, brighter note. Expect visibility around 16.1 km. The sun rises at 06:56 and sets at 19:10, for a total of 12 hours 14 minutes of sunlight today.
Taken together, settled sunshine in Gaithersburg on September 15, 2026 makes outdoor timing easier, with highs near 26°C.
Frequently asked questions about weather in Gaithersburg
How warm does it get in Gaithersburg?
The warmest month in Gaithersburg is July, with average high temperatures of 31°C. The average temperature during this period is around 26°C.
How cold does it get in Gaithersburg?
The coldest month in Gaithersburg is January, with average low temperatures of -1°C. The average temperature during this period is around 2°C.
What is the wettest time of year in Gaithersburg?
The wettest month in Gaithersburg is July, with an average of 142mm of precipitation.
What is the driest time of year in Gaithersburg?
The driest month in Gaithersburg is November, with an average of 74mm of precipitation.
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