Average weather for Channel Islands in September
It's pleasantly warm in September in Channel Islands with an average temperature of 20°C. Temperatures this month range from a low of 18°C to a high of 22°C. At night, you can expect temperatures between 13°C and 16°C.
Start of September
The month of September starts in Channel Islands with mild temps, averaging around 21°C during the day and nights around 16°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
Mid September
By mid-September, daytime temps stay steady at around 21°C, with nights around 15°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 Channel Islands is around 19°C, while nighttime temps are about 14°C. A shower might pop up, but overall, the weather will be dry and sunny.
In September, there is an average of 48 mm of precipitation, spread over 7 days. The wind speed is around 4 Bft, mostly coming from the South.
Channel Islands in September |
New York | ||
|---|---|---|---|
 Average temperature |
20°C | 27°C | |
 Max. temperature |
22°C | 31°C | |
| Min. temperature |
18°C | -5°C | |
 Total precipitation |
48 mm | 57 mm | |
| Rainy days |
7 days | 9 days | |
August
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is September a good time to visit Channel Islands?
Looking for great weather? September is a good time to be in Channel Islands. The temperatures are nice, and there’s not too much rain.
Temperature records
With 31°C in 2020, Channel Islands reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 14°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of 6°C to a highest value of 20°C.
Check out the climate of Channel Islands for all months and discover the best travel time
Daily Temperature in September in Channel Islands
This chart shows the average daily high and low temperatures in September for Channel Islands, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Channel Islands
The chart below shows the average daily precipitation in September for Channel Islands, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 7 days of precipitation in Channel Islands.
Daily UV index in September in Channel Islands
This chart shows the average daily UV index in September in Channel Islands, 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.
Temperature in September in Channel Islands over the years
This chart shows the average temperature in September in Channel Islands, measured in degrees Celsius, over the past few years.
Total precipitation in September in Channel Islands over the years
This chart shows the average precipitation in September in Channel Islands, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Channel Islands
Click on any day in September to get detailed info about the usual weather on that day in Channel Islands. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Channel Islands
Have you been to Channel Islands in September?
Share your weather experience in September in Channel Islands.
Average weather in Channel Islands by month
Click on a month below to see detailed weather info for Channel Islands. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Channel Islands for all months at once
