Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average snowfall in October
- Average snowfall days in October
- Average sea temperature in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
The onset of October results in a decrease in the average high-temperature, receding from a pleasant 72.7°F (22.6°C) in September to a refreshing 61.5°F (16.4°C). During the nights in October, Chelsea experiences a consistent average temperature of 48.4°F (9.1°C).Humidity
In Chelsea, the average relative humidity in October is 75%.Rainfall
In Chelsea, during October, the rain falls for 13.3 days and regularly aggregates up to 2.56" (65mm) of precipitation. In Chelsea, during the entire year, the rain falls for 141.4 days and collects up to 27.2" (691mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Chelsea. October is the first month it typically snows in Chelsea. Throughout October, in the average 0.1 snowfall days, it receives 0.12" (3mm) of snow. In Chelsea, during the entire year, snow falls for 29.8 days and aggregates up to 15.75" (400mm) of snow.Ocean temperature
In October, the average ocean temperature is 59.5°F (15.3°C).Note: Most individuals do not find swimming at 59.5°F (15.3°C) to be enjoyable. As the water temperature declines below 69.8°F (21°C), maintaining control over one's breathing becomes harder.
Daylight
The average length of the day in October is 11h and 3min.On the first day of the month, sunrise is at 6:42 am and sunset at 6:25 pm. On the last day of October, in Chelsea, sunrise is at 7:17 am and sunset at 5:38 pm EDT.
Sunshine
In Chelsea, Massachusetts, the average sunshine in October is 6h.UV index
In Chelsea, the average daily maximum UV index in October is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The UV index of 3 in October translates into these instructions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Always opt for UVA and UVB-resistant sunglasses on radiant days. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Frequently asked questions
What is the temperature in October in Chelsea?
What is the average humidity in October in Chelsea?
How much does it rain in Chelsea in October?
When does it start to snow in Chelsea?
How cold is the water in October in Chelsea?
What is the average length of the day in October in Chelsea?
When are sunrise and sunset in October in Chelsea?
How long on average sun shines in October in Chelsea?
How high is the UV index in October in Chelsea?
Average temperature in October
Chelsea, MA
- Average high temperature in October: 61.5°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.2°F).
- Average low temperature in October: 48.4°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in October
Chelsea, MA
- Average pressure in October: 30.01"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in October
Chelsea, MA
- Average wind speed in October: 8.3mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in October
Chelsea, MA
- Average humidity in October: 75%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (69%).
Average rainfall in October
Chelsea, MA
- Average rainfall in October: 2.56"
The wettest months (with the highest rainfall) are March, April and December (2.91").
The driest month (with the least rainfall) is September (1.26").
Average rainfall days in October
Chelsea, MA
- Average rainfall days in October: 13.3 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in October
Chelsea, MA
- Average snowfall in October: 0.12"
The month with the highest snowfall is February (4.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in October
Chelsea, MA
- Average snowfall days in October: 0.1 days
The months with the highest number of snowfall days are January and February (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in October
Chelsea, MA
- Average sea temperature in October: 59.4°F
The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).
Average daylight in October /
Average sunshine in October
Chelsea, MA
- Average daylight in October: 11h and 0min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in October: 6h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in October
Chelsea, MA
- Average sunshine days in October: 15.7 days
The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is April (13 days).
Average UV index in October
Chelsea, MA
- Average UV index in October: 3
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in October
Chelsea, MA
- Average cloud cover in October: 44
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in October
Chelsea, MA
- Average visibility in October: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Chelsea, Massachusetts, USA
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