May weather forecast
Thief River Falls, MN

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Weather in May

May brings a significant rise in temperature, with temperatures hovering in the warmer range. The increased temperatures bolster the creation of a more humid environment. While the month experiences higher rainfall, it also houses the longest sunshine duration, balancing the weather conditions adequately. With daylight slowly nearing its annual peak, the ambiance created is predominantly spring-like. The cloud cover continues its declining trend from April, leading to a boost in the UV index.

Temperature

A notable increase in the average high-temperature is observed during May, soaring from a frosty 48.7°F (9.3°C) in April to a refreshing 63.3°F (17.4°C). Thief River Falls's nights in May experience an average temperature drop to a chilly 46°F (7.8°C).

Humidity

May and August, with an average relative humidity of 66%, are the least humid months in Thief River Falls.

Rainfall

In Thief River Falls, in May, during 14.2 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. In Thief River Falls, Minnesota, during the entire year, the rain falls for 104.3 days and collects up to 18.39" (467mm) of precipitation.

Snowfall

Months with snowfall in Thief River Falls, Minnesota, are January through May, October through December. May is the last month it regularly snows. During 0.5 snowfall days, in May, Thief River Falls aggregates 0.2" (5mm) of snow. In Thief River Falls, during the entire year, snow falls for 81.1 days and aggregates up to 25.08" (637mm) of snow.

Daylight

The average length of the day in May is 15h and 13min.
On the first day of May in Thief River Falls, sunrise is at 6:04 am and sunset at 8:38 pm. On the last day of the month, sunrise is at 5:28 am and sunset at 9:16 pm CDT.

Sunshine

The average sunshine in May in Thief River Falls is 8.6h.

UV index

In May, the average daily maximum UV index in Thief River Falls, Minnesota, is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: In May, a daily maximum UV index of 4 leads to the following instructions:
Undertake precautions - Guarding against sun damage is counselled. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
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Frequently asked questions

What is the usual temperature for Thief River Falls in May?

The high-temperature, in May, in Thief River Falls, records 63.3°F (17.4°C), while the low-temperature is 46°F (7.8°C).

What are the least humid months in Thief River Falls?

The months with the lowest humidity are May and August, with an average relative humidity of 66%.

What is the average humidity in May in Thief River Falls?

In Thief River Falls, Minnesota, the average relative humidity in May is 66%.

How much does it rain in Thief River Falls in May?

In May, in Thief River Falls, Minnesota, the rain falls for 14.2 days. Throughout May, 2.24" (57mm) of precipitation is accumulated.

What is the last month it snows in Thief River Falls?

May is the last month it regularly snows in Thief River Falls. During 0.5 snowfall days, in May, Thief River Falls aggregates 0.2" (5mm) of snow.

What is the average length of the day in May in Thief River Falls?

In May, the average day length in Thief River Falls, Minnesota, is 15h and 13min.

When are sunrise and sunset in May in Thief River Falls?

In May, on the first day of the month, sunrise is at 6:04 am and sunset at 8:38 pm. On the last day of the month, in Thief River Falls, sunrise is at 5:28 am and sunset at 9:16 pm CDT.

How long on average sun shines in May in Thief River Falls?

In Thief River Falls, the average sunshine duration in May is 8.6h.

What is the UV index intensity in May in Thief River Falls?

The average daily maximum UV index in May in Thief River Falls, Minnesota, is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJFMAMayJJASOND
Apr
May
Jun
Average high temperature
48.7°F 9.3°C
63.3°F 17.4°C
72°F 22.2°C
Average low temperature
32.7°F 0.4°C
46°F 7.8°C
54.5°F 12.5°C
Average pressure
29.99" 762mmHg
29.94" 760mmHg
29.86" 758mmHg
Average wind speed
9.8mph 15.8km/h
9.3mph 15km/h
8.5mph 13.7km/h
Average max. wind speed
10.5mph 16.9km/h
9.9mph 15.9km/h
9.2mph 14.8km/h
Average wind speed gusts
14.6mph 23.5km/h
14mph 22.5km/h
13.4mph 21.6km/h
Average humidity
69%
66%
77%
Average rainfall
1.3" 33mm
2.24" 57mm
3.15" 80mm
Average rainfall days
10.1
14.2
16.3
Average snowfall
3.03" 77mm
0.2" 5mm
0" 0mm
Average snowfall days
5.7
0.5
0
Average daylight
13h 4min
15h 1min
16h 0min
Average sunshine
7h 2min
8h 4min
9h 2min
Average sunshine days
14.4
15.3
11.3
Average UV index
3
4
5
Average cloud cover
52%
42%
39%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in May
Thief River Falls, MN

Average temperature in May - Thief River Falls, MN
  • Average high temperature in May: 63.3°F

The warmest months (with the highest average high temperature) are July and August (78.4°F).
The month with the lowest average high temperature is January (13.8°F).

  • Average low temperature in May: 46°F

The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (0°F).

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Average pressure in May
Thief River Falls, MN

Average pressure in May - Thief River Falls, MN
  • Average pressure in May: 29.94"Hg

The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in May
Thief River Falls, MN

Average wind speed in May - Thief River Falls, MN
  • Average wind speed in May: 9.3mph

The windiest month (with the highest average wind speed) is October (10.1mph).
The calmest month (with the lowest average wind speed) is July (7.9mph).

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Average humidity in May
Thief River Falls, MN

Average humidity in May - Thief River Falls, MN
  • Average humidity in May: 66%

The months with the highest relative humidity are January and February (93%).
The months with the lowest relative humidity are May and August (66%).

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Average rainfall in May
Thief River Falls, MN

Average rainfall in May - Thief River Falls, MN
  • Average rainfall in May: 2.24"

The wettest month (with the highest rainfall) is June (3.15").
The driest months (with the least rainfall) are January and February (0.63").

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Average rainfall days in May
Thief River Falls, MN

Average rainfall days in May - Thief River Falls, MN
  • Average rainfall days in May: 14.2 days

The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is January (1.9 days).

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Average snowfall in May
Thief River Falls, MN

Average snowfall in May - Thief River Falls, MN
  • Average snowfall in May: 0.2"

The month with the highest snowfall is December (5.24").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Thief River Falls, MN

Average snowfall days in May - Thief River Falls, MN
  • Average snowfall days in May: 0.5 days

The month with the highest number of snowfall days is December (16.2 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in May /
Average sunshine in May
Thief River Falls, MN

Average daylight in May / Average sunshine in May - Thief River Falls, MN
  • Average daylight in May: 15h and 1min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in May: 8h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).

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Average sunshine days in May
Thief River Falls, MN

Average sunshine days in May - Thief River Falls, MN
  • Average sunshine days in May: 15.3 days

The month with the most sunshine days is August (18.5 days).
The month with the least sunshine days is June (11.3 days).

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Average UV index in May
Thief River Falls, MN

Average UV index in May - Thief River Falls, MN
  • Average UV index in May: 4

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).

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Average cloud cover in May
Thief River Falls, MN

Average cloud cover in May - Thief River Falls, MN
  • Average cloud cover in May: 42

The months with the most cloud cover are January and February (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in May
Thief River Falls, MN

Average visibility in May - Thief River Falls, MN
  • Average visibility in May: 6mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).

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Thief River Falls, Minnesota, USA

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