Weather in United States in September

So you're interested in going to United States in September

September is a hot and slightly rainy time for sunbathing in United States. September is a good month for swimming in United States with warm sea temperatures. Consider visiting United States in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for September.

Temperature in United States in September

The average maximum temperature in United States in September is 27°. The average maximum temperature is 27° in the previous month and 24° in the next month.

The average temperature in United States in September is 22°. The average temperature ranges is 23° in the previous month and 20° in the next month.

The average minimum temperature in United States in September is 18°. The minimum temperature is 19° in the previous month and 16° in the next month.

Sunshine in United States in September

The average day light hours per day in United States in September are 12.4 and there are 8.1 hours of sunshine per day on average during September making it a sunny month with few clouds.

The ultraviolet index in United States in September is typically 9.2 during September. An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in United States in September

The average sea water temperature in United States in September is 24.4° which is warm and pleasant for relaxing and swimming for long periods.

Rainfall in United States in September

The average total rainfall in United States in September is 45.8cm and on average there are 10.7 rainy days in September making it a slightly wet time to visit the beach.

Humidity in United States in September

The maximum dew point (an indicator of humidity) in United States in September is 18° which is somewhat uncomfortable for most people in cities but fine on a beach. The dew point is 19° in the previous month and 16° in the next month.

The average maximum relative humidity in United States in September is typically 88.7%. The maximum relative humidity is 88.7% in the previous month and 88% in the next month.

The average relative humidity in United States in September is typically 73.2%. The average relative humidity is 73.8% in the previous month and 72% in the next month.

Wind Speed in United States in September

The average maximum wind speed in United States in September is typically 25kmh. The average maximum wind speed is 26kmh in the previous month and 25kmh in the next month.

The average wind speed in United States in September is typically 11kmh. The average wind speed is 11kmh in the previous month and 11kmh in the next month.

The average wind direction in United States in September is from the South.

Monthly Averages

Suggested Beaches in September

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