October weather forecast and climate
Harwinton, CT

Weather in October

October, like September, is another mild autumn month in Harwinton, Connecticut, with average temperature ranging between min 44.6°F (7°C) and max 59.4°F (15.2°C).

Temperature

In Harwinton, the average high-temperature drops, from a pleasant 72°F (22.2°C) in September, to a mild 59.4°F (15.2°C). In October, the average low-temperature is 44.6°F (7°C).

Humidity

The average relative humidity in Harwinton is 80%.

Rainfall

In Harwinton, it is raining for 14.5 days, with typically 3.27" (83mm) of accumulated precipitation. Throughout the year, there are 157.7 rainfall days, and 32.72" (831mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. October is the first month it typically snows. Throughout October, in the average 0.5 snowfall days, it receives 0.55" (14mm) of snow. Throughout the year, there are 40 snowfall days, and 20.55" (522mm) of snow is accumulated.

Daylight

In Harwinton, Connecticut, the average length of the day is 11.1h.

Sunshine

The average sunshine in October is 5.6h.

UV index

In October, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 3 in October transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in October in Harwinton?

The average high-temperature, in October, in Harwinton, Connecticut, is 59.4°F (15.2°C), while the average low-temperature is 44.6°F (7°C).

What is the average humidity in October in Harwinton?

In Harwinton, Connecticut, the average relative humidity in October is 80%.

How many days does it rain in October in Harwinton?

In Harwinton, in October, it is raining for 14.5 days, with typically 3.27" (83mm) of accumulated precipitation.

When does it start snowing in Harwinton?

October is the first month it typically snows in Harwinton, Connecticut. Throughout October, in the average 0.5 snowfall days, it receives 0.55" (14mm) of snow.

How many hours of daylight does Harwinton have in October?

The average length of the day in October in Harwinton, Connecticut, is 11.1h.

How many hours of sunshine does Harwinton have in October?

In October, the average sunshine in Harwinton is 5.6h.

What is the UV index reading in October in Harwinton?

In Harwinton, the average daily maximum UV index in October is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in October
Harwinton, CT

Average temperature in October - Harwinton, CT
  • Average high temperature in October: 59.4°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (31.3°F).

  • Average low temperature in October: 44.6°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).

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Average pressure in October
Harwinton, CT

Average pressure in October - Harwinton, CT
  • Average pressure in October: 30.01"

The month with the highest atmospheric pressure is November (30.09").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in October
Harwinton, CT

Average wind speed in October - Harwinton, CT
  • Average wind speed in October: 7mph

The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

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Average humidity in October
Harwinton, CT

Average humidity in October - Harwinton, CT
  • Average humidity in October: 80%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in October
Harwinton, CT

Average rainfall in October - Harwinton, CT
  • Average rainfall in October: 3.27"

The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is September (2.01").

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Average rainfall days in October
Harwinton, CT

Average rainfall days in October - Harwinton, CT
  • Average rainfall days in October: 14.5 days

The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is January (8.2 days).

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Average snowfall in October
Harwinton, CT

Average snowfall in October - Harwinton, CT
  • Average snowfall in October: 0.55"

The month with the highest snowfall is February (5.28").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in October
Harwinton, CT

Average snowfall days in October - Harwinton, CT
  • Average snowfall days in October: 0.5 days

The month with the highest number of snowfall days is February (10.3 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in October /
Average sunshine in October
Harwinton, CT

Average daylight in October / Average sunshine in October - Harwinton, CT
  • Average daylight in October: 11.1h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in October: 5.6h

Months with the most sunshine are July and August (Average sunshine: 10.1h).
The month with the least sunshine is February (Average sunshine: 4.4h).

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Average sunshine days in October
Harwinton, CT

Average sunshine days in October - Harwinton, CT
  • Average sunshine days in October: 13.6 days

The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is June (11.8 days).

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Average UV index in October
Harwinton, CT

Average UV index in October - Harwinton, CT
  • Average UV index in October: 3

The month with the highest UV index is June (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in October
Harwinton, CT

Average cloud cover in October - Harwinton, CT
  • Average cloud cover in October: 45

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 36).

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Average visibility in October
Harwinton, CT

Average visibility in October - Harwinton, CT
  • Average visibility in October: 5mi

Months with the highest visibility are April, November and December (6mi).
Months with the lowest visibility are January, February, March, May, June, July, August, September and October (5mi).

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