See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
15°
Overcast
Feels Like: 14°
Min: 13°
Max: 18°
The next few hours will be overcast, with today reaching 18°C and dropping to 13°C. The coming days will be mostly clear from afternoon until night.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:51
Sunrise
19:01
Sunset
Moon
Waxing Crescent
12:31
Moonrise
21:29
Moonset
Daily Forecast
Today
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Air Quality Data Available
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UV Index
Humidity
Weather in Arroyo Grande today, September 16, 2026
Arroyo Grande looks cloudy on September 16, 2026, with grey skies for much of the day. Sunshine stays limited, so the overall tone is muted from the morning onward. Expect a grey start, with morning cloud around 100% by 01:00. Outdoor plans early on should not rely on bright skies.
The day peaks near 18°C and cools toward 13°C. Moisture in the air spans 75%-96%, with the highest values around 20:00. Expect gentle winds, highest near 15:00 at 5.1 km/h.
Afternoon skies stay clogged, peaking close to 100% near 12:00. The grey theme continues rather than clearing out. Visibility holds near 15.5 km, though it can fall to 13.5 km. The sun rises at 06:51 and sets at 19:01, for a total of 12 hours 10 minutes of sunlight today.
Overall, Arroyo Grande on September 16, 2026 stays grey and muted, so outdoor plans may want a flexible backup even with a high near 18°C.
Frequently asked questions about weather in Arroyo Grande
How warm does it get in Arroyo Grande?
The warmest month in Arroyo Grande is September, with average high temperatures of 21°C. The average temperature during this period is around 18°C.
How cold does it get in Arroyo Grande?
The coldest month in Arroyo Grande is February, with average low temperatures of 9°C. The average temperature during this period is around 12°C.
What is the wettest time of year in Arroyo Grande?
The wettest month in Arroyo Grande is January, with an average of 109mm of precipitation.
What is the driest time of year in Arroyo Grande?
The driest month in Arroyo Grande is July, with an average of 0mm of precipitation.
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