Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The weather during September records an average high-temperature of an enjoyable 18.5°C (65.3°F), closely mirroring the preceding month. Rochester sees an average low-temperature of 12.1°C (53.8°F) during September.Humidity
The average relative humidity in September is 78%.Rainfall
In Rochester, during September, the rain falls for 12 days and regularly aggregates up to 27mm (1.06") of precipitation. Throughout the year, there are 174.7 rainfall days, and 446mm (17.56") of precipitation is accumulated.Snowfall
In Rochester, United Kingdom, snow does not fall in April through October.Daylight
In Rochester, the average length of the day in September is 12h and 38min.On the first day of September in Rochester, sunrise is at 6:11 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:37 pm BST.
Sunshine
In September, the average sunshine in Rochester is 7.9h.UV index
In September, the average daily maximum UV index in Rochester is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: In September, a daily UV index of 4 turns into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Rochester in September?
What is the average humidity in September in Rochester?
How many days does it rain in September in Rochester?
When it does not snow in Rochester?
What is the average length of the day in September in Rochester?
What time are sunrise and sunset in September in Rochester?
How many hours of sunshine does Rochester have in September?
What is the UV index intensity in September in Rochester?
Average temperature in September
Rochester, United Kingdom
- Average high temperature in September: 18.5°C
The warmest months (with the highest average high temperature) are July and August (21.3°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in September: 12.1°C
The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is January (2.8°C).
Average pressure in September
Rochester, United Kingdom
- Average pressure in September: 1017.1mbar
The month with the highest atmospheric pressure is September (1017.1mbar).
The month with the lowest atmospheric pressure is November (1010.8mbar).
Average wind speed in September
Rochester, United Kingdom
- Average wind speed in September: 14.6km/h
The windiest months (with the highest average wind speed) are February and December (19.6km/h).
The calmest month (with the lowest average wind speed) is July (14km/h).
Average humidity in September
Rochester, United Kingdom
- Average humidity in September: 78%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (75%).
Average rainfall in September
Rochester, United Kingdom
- Average rainfall in September: 27mm
The wettest month (with the highest rainfall) is December (53mm).
The driest month (with the least rainfall) is April (24mm).
Average rainfall days in September
Rochester, United Kingdom
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is November (17.5 days).
The month with the least rainy days is September (12 days).
Average snowfall in September
Rochester, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (26mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Rochester, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Rochester, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 7h and 5min
The months with the most sunshine are July and August (Average sunshine: 8h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in September
Rochester, United Kingdom
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is November (9.7 days).
Average UV index in September
Rochester, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Rochester, United Kingdom
- Average cloud cover in September: 43
The month with the most cloud cover is February (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 43).
Average visibility in September
Rochester, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Rochester, United Kingdom
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