Weathermondo.com
United StatesThe weather in September in Hamilton
It's pleasantly warm in September in Hamilton with an average temperature of 20°C. Temperatures this month range from a low of 18°C to a high of 23°C. At night, you can expect temperatures between 10°C and 14°C.
Looking for great weather? September is a good time to be in Hamilton. The temperatures are nice, and there’s not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Hamilton, Washington. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 30°C in 2020, Hamilton reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 13°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of 3°C to a highest value of 17°C.
Rainfall amount
In September, there is an average of 78 mm of precipitation, spread over 10 days. The wind speed is around 3 Bft, mostly coming from the Southwest.
Daily weather in September for Hamilton
Click on any day in September to get detailed info about the usual weather on that day in Hamilton. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Hamilton | New York | |
|---|---|---|
| Average temperature | 20°C | 27°C |
| Max. temperature | 23°C | 31°C |
| Min. temperature | 10°C | -5°C |
| Total precipitation | 78 mm | 57 mm |
| Rainy days | 10 days | 9 days |
Start of September
The month of September starts in Hamilton with warm temps, averaging around 22°C during the day and nights around 13°C.
Mid September
By mid-September, daytime temps drop to around 21°C, with nights around 12°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in Hamilton is around 19°C, while nighttime temps are about 11°C. A shower might pop up, but overall, the weather will be dry and sunny.
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UV index
The UV index is a maximum of 5 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Check out the climate of Hamilton for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in Hamilton, Washington. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Hamilton
Temperature in September in Hamilton over the years
Precipitation charts
These charts show the average amount of precipitation in September in Hamilton, Washington. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Hamilton
Total precipitation in September in Hamilton over the years
Daily UV index in September in Hamilton
This chart shows the average daily UV index in September in Hamilton, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in Hamilton
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Average weather in Hamilton by month
Click on a month below to see detailed weather info for Hamilton. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.