The highest day temperature in September 2026 was 93°F. The lowest night temperature was 77°F. The average values for day and night temperatures during September were 88.8°F и 78.0°F respectivly.

Most of the days in September are gloomy but you can also expect sunny days.

Precipitation total in September for Penonome is 4.9 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 4.1 mph. It makes September one of the most windless months of the year for Penonome.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Penonome in September is 4.1 hours.