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San Blas weather in September

Weather in San Blas: September

Average day temperature: 89.7°F
Average night temperature: 77.3°F
Sea water temperature: 87.8°F
Number of sunny days: 2 days
Day length: 12.0 - 12.5 hours
Number of rainy days: 4 days
Precipitation totals: 2.0 in.

Air temperature in September, °F

Show year:
2026
2025
2024

The highest day temperature during September of 2026 was 97°F. At the same time the lowest night temperature was 74°F. Daily and nightly averages during September were 93.1°F and 76.8°F.

Sea water temperature in San Blas in September, °F

Show year:
2026
2025
2024

The average sea water temperature in September of 2026 was 89.5°F. The highest and lowest sea temperatures during the month were 90.3°F and 88.5°F.

Sunny, partly cloudy and cloudy days

Mostly all days in September are cloudy but sunny and partly cloudy days are also possible.

Precipitation total in September, in.

Precipitation total value in San Blas in September is 2.0 in. Other months of the year show relatively similar values.

Wind speed in September, mph

The average wind speed value in September is 3.6 mph It makes September one of the least windy months of the year.

Average sunny hours

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 4.8.

Best time for vacation in San Blas

Sunniest months:
May 27 days
March 27 days
April 26 days
Warmest months:
May 94.1 °F
June 92.2 °F
April 91.3 °F
Warmest sea temp:
August 88.0 °F
September 87.8 °F
July 87.5 °F
Coldest months:
January 84.0 °F
February 85.8 °F
December 86.7 °F
Rainiest months:
August 6 days
September 4 days
July 4 days
Windiest months:
May 5.1 mph
April 4.9 mph
June 4.8 mph

San Blas on a weather map

San Blas
+82°F
NE 2 mph
Feels like: +91°F
Precip.: 17%
Places in Mexico:
Name
°F
+81°F
+82°F
+84°F
+86°F
+88°F
+86°F
+88°F
+99°F
+88°F
24 Hours Forecast
San Blas
Local time: 11:56
October 04, sunday
1200
82°F
NE
2 mph
1500
88°F
E
6 mph
1800
79°F
E
2 mph
2100
77°F
W
3 mph
October 05, monday
0000
75°F
W
5 mph
0300
73°F
W
2 mph
0600
73°F
SW
3 mph
0900
82°F
SW
4 mph
Units of measurement: °C / °F