October weather forecast and climate
Simpson, MT

October, like September, in Simpson, Montana, is another fresh autumn month, with average temperature varying between 38.8°F (3.8°C) and 54.3°F (12.4°C).

Temperature

In Simpson, the average high-temperature plummets, from an agreeable 70.5°F (21.4°C) in September, to a cool 54.3°F (12.4°C). In Simpson, in October, the average low-temperature is 38.8°F (3.8°C).

Humidity

In Simpson, the average relative humidity in October is 59%.

Rainfall

In Simpson, Montana, in October, it is raining for 7.7 days, with typically 0.59" (15mm) of accumulated precipitation. In Simpson, during the entire year, the rain falls for 98.7 days and collects up to 8.23" (209mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. In October, it is snowing for 1.9 days. Throughout October, 0.79" (20mm) of snow is accumulated. In Simpson, Montana, during the entire year, snow falls for 53.5 days, and aggregates up to 14.25" (362mm) of snow.

Daylight

In Simpson, Montana, the average length of the day is 10.8h.

Sunshine

In October, the average sunshine in Simpson, Montana, is 6.6h.

UV index

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Simpson. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to the UV radiation for average individuals.
Note: In October, the average maximum UV index of 2 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in October in Simpson?

In October, in Simpson, the average high-temperature is 54.3°F (12.4°C), and the average low-temperature is 38.8°F (3.8°C).

What is the average humidity in October in Simpson?

In October, the average relative humidity in Simpson is 59%.

How many days does it rain in October in Simpson?

In Simpson, in October, during 7.7 rainfall days, 0.59" (15mm) of precipitation is typically accumulated.

How much does it snow in Simpson in October?

In Simpson, Montana, in October, snow falls for 1.9 days, with typically accumulated 0.79" (20mm) of snow.

What is the average length of the day in October in Simpson?

In October, the average length of the day is 10.8h.

How long on average sun shines in October in Simpson?

In October, the average sunshine in Simpson, Montana, is 6.6h.

When is the lowest UV index in Simpson?

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Simpson.

How high is the UV index in October in Simpson?

In October, the average daily maximum UV index in Simpson, Montana, is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from the exposure to the Sun's UV rays.
Average temperature in October - Simpson, MT
  • Average high temperature in October: 54.3°F

The warmest month (with the highest average high temperature) is July (82.8°F).
Months with the lowest average high temperature are January and December (27.1°F).

  • Average low temperature in October: 38.8°F

The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is February (13.5°F).

Average pressure in October - Simpson, MT
  • Average pressure in October: 29.97"

Months with the highest atmospheric pressure are January and February (30.12").
The month with the lowest atmospheric pressure is June (29.84").

Average wind speed in October - Simpson, MT
  • Average wind speed in October: 10.1mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).

Average humidity in October - Simpson, MT
  • Average humidity in October: 59%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (40%).

Average rainfall in October - Simpson, MT
  • Average rainfall in October: 0.59"

The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is December (0.31").

Average rainfall days in October - Simpson, MT
  • Average rainfall days in October: 7.7 days

The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is February (4 days).

Average snowfall in October - Simpson, MT
  • Average snowfall in October: 0.79"

The month with the highest snowfall is February (2.72").
Months with the least snowfall are June, July and August (0").

Average snowfall days in October - Simpson, MT
  • Average snowfall days in October: 1.9 days

The month with the highest number of snowfall days is February (11 days).
Months with the least snowfall days are June, July and August (0 days).

Average daylight in October / Average sunshine in October - Simpson, MT
  • Average daylight in October: 10.8h

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.3h).

  • Average sunshine in October: 6.6h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is February (Average sunshine: 5.3h).

Average sunshine days in October - Simpson, MT
  • Average sunshine days in October: 19.7 days

The month with the most sunshine days is September (20.3 days).
The month with the least sunshine days is April (12.8 days).

Average UV index in October - Simpson, MT
  • Average UV index in October: 2

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

Average cloud cover in October - Simpson, MT
  • Average cloud cover in October: 29

The month with the most cloud cover is February (Cloud cover 46).
Months with the least cloud cover are July and August (Cloud cover 16).

Average visibility in October - Simpson, MT
  • Average visibility in October: 6mi

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