See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
15°
Overcast
Feels Like: 15°
Min: 10°
Max: 17°
The next few hours will be overcast, with today reaching 17°C and dropping to 10°C. The coming days will be light rain throughout the day.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
05:48
Sunrise
17:48
Sunset
Moon
Waxing Gibbous
13:30
Moonrise
00:42
Moonset
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View stargazing scoreWeather in La Mesa today, September 20, 2026
La Mesa looks damp on September 20, 2026, so plan for wet spells during the day. Early travel and outdoor time should assume rain can arrive quickly.
The day peaks near 17°C and cools toward 10°C. Expect humidity between 65% and 88%, most humid near 22:00. Winds stay light, near 2.0 km/h by 16:00, so the day feels still more than breezy.
Through the afternoon wet weather remains a factor, with rain chances near 64% around 16:00. Cloud also stays substantial, close to 94% near 23:00. Views remain open at about 16.1 km. Sunrise is at 05:48 and sunset at 17:48, giving 12 hours 0 minutes of sunlight today.
The practical takeaway for La Mesa on September 20, 2026 is simple: plan for rain, keep layers handy, and work around a high of about 17°C.
Frequently asked questions about weather in La Mesa
How warm does it get in La Mesa?
The warmest month in La Mesa is September, with average high temperatures of 20°C. The average temperature during this period is around 14°C.
How cold does it get in La Mesa?
The coldest month in La Mesa is January, with average low temperatures of 9°C. The average temperature during this period is around 14°C.
What is the wettest time of year in La Mesa?
The wettest month in La Mesa is March, with an average of 351mm of precipitation.
What is the driest time of year in La Mesa?
The driest month in La Mesa is July, with an average of 107mm of precipitation.
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