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 sea temperature 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
September heralds a minor drop in average high-temperature, sliding from August's moderately hot 75.4°F (24.1°C) to an agreeable 68.9°F (20.5°C). Richmond's temperature drops to an average low of 52.2°F (11.2°C) during the nights of September.Humidity
The average relative humidity in September in Richmond, Maine, is 80%.Rainfall
The month with the least rainfall is September, when the rain falls for 9.5 days and typically collects 1.38" (35mm) of precipitation.Snowfall
June through September are months without snowfall.Ocean temperature
In Richmond, Maine, in September, the average water temperature is 59.2°F (15.1°C).Note: Most people do not find pleasure in swimming when the water temperature is 59.2°F (15.1°C). Breathing becomes increasingly difficult to manage as the water temperature drops from 69.8°F (21°C) to 59°F (15°C).
Daylight
In Richmond, the average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:03 am and sunset at 7:14 pm. On the last day of September, sunrise is at 6:36 am and sunset at 6:21 pm EDT.
Sunshine
The average sunshine in September in Richmond is 8.4h.UV index
In September, the average daily maximum UV index in Richmond, Maine, is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In September, a daily UV index of 4 turns into the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Frequently asked questions
What is the temperature in September in Richmond?
What is the average humidity in September in Richmond?
What is the driest month in Richmond?
How much does it rain in Richmond in September?
When it does not snow in Richmond?
Does it snow in Richmond in September?
How cold is the water in September in Richmond?
What is the average length of the day in September in Richmond?
When are sunrise and sunset in September in Richmond?
How long on average sun shines in September in Richmond?
What is the UV index intensity in September in Richmond?
Average temperature in September
Richmond, ME
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (75.7°F).
The month with the lowest average high temperature is January (28.2°F).
- Average low temperature in September: 52.2°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in September
Richmond, ME
- Average pressure in September: 30.04"Hg
The months with the highest atmospheric pressure are September and November (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Richmond, ME
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is March (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in September
Richmond, ME
- Average humidity in September: 80%
The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is November (76%).
Average rainfall in September
Richmond, ME
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is October (2.95").
The driest month (with the least rainfall) is September (1.38").
Average rainfall days in September
Richmond, ME
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is April (15.1 days).
The month with the least rainy days is January (6.4 days).
Average snowfall in September
Richmond, ME
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Richmond, ME
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (9.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Richmond, ME
- Average sea temperature in September: 59.1°F
The best month for swimming (with the highest average sea temperature) is August (61.5°F).
The coldest month (with the lowest average sea temperature) is March (37.7°F).
Average daylight in September /
Average sunshine in September
Richmond, ME
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Richmond, ME
- Average sunshine days in September: 18.1 days
The month with the most sunshine days is September (18.1 days).
The month with the least sunshine days is April (11.7 days).
Average UV index in September
Richmond, ME
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Richmond, ME
- Average cloud cover in September: 35
The months with the most cloud cover are February, March and April (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Richmond, ME
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, September, October, November and December (6mi).
The months with the lowest visibility are May, June, July and August (5mi).
Richmond, Maine, USA
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