May weather forecast
Thompson Falls, MT

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Weather in May

May weather in Thompson Falls announces itself with its signature blend of mild temperature highs and relative humidity decreasing to 71%. Snowfall becomes a thing of the past in this period as the city welcomes more rainfall instead. As daylight hours extend, the sun regales the city with its dazzling presence, offering an invitation to indulge in outdoor activities. May's weather offers residents the much-anticipated reprieve from the long, cold winter.

Temperature

The arrival of May in Thompson Falls brings a temperature shift, with the average high-temperature escalating from a frosty 47.1°F (8.4°C) in April to a mild 60.1°F (15.6°C). With a significant daily temperature differential, Thompson Falls's nighttime temperature in May falls to an average of 34.3°F (1.3°C).

Humidity

In May, the average relative humidity in Thompson Falls, Montana, is 71%.

Rainfall

In Thompson Falls, during May, the rain falls for 14.4 days and regularly aggregates up to 1.57" (40mm) of precipitation. In Thompson Falls, during the entire year, the rain falls for 152.1 days and collects up to 22.09" (561mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall in Thompson Falls. May is the last month it regularly snows. During 0.4 snowfall days, in May, Thompson Falls aggregates 0.12" (3mm) of snow. Throughout the year, there are 90.2 snowfall days, and 58.15" (1477mm) of snow is accumulated.

Daylight

The average length of the day in May in Thompson Falls, Montana, is 15h and 10min.
On the first day of May in Thompson Falls, Montana, sunrise is at 6:22 am and sunset at 8:54 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 9:30 pm MDT.

Sunshine

The average sunshine in May is 9.8h.

UV index

In Thompson Falls, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 4 during May translates into these guidelines:
Undertake protective steps - Preventing sun damage is advised. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
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Frequently asked questions

What is the temperature in May in Thompson Falls?

In May, the average high-temperature and low-temperature are 60.1°F (15.6°C) and 34.3°F (1.3°C) respectively.

What is the average humidity in May in Thompson Falls?

In Thompson Falls, Montana, the average relative humidity in May is 71%.

How many days does it rain in May in Thompson Falls?

In Thompson Falls, Montana, in May, it is raining for 14.4 days, with typically 1.57" (40mm) of accumulated precipitation.

What is the last month it snows in Thompson Falls?

May is the last month it regularly snows in Thompson Falls, Montana. During 0.4 snowfall days, in May, Thompson Falls aggregates 0.12" (3mm) of snow.

What is the average length of the day in May in Thompson Falls?

In May, the average day length in Thompson Falls is 15h and 10min.

What time are sunrise and sunset in May in Thompson Falls?

In May, on the first day of the month, sunrise is at 6:22 am and sunset at 8:54 pm. On the last day of the month, in Thompson Falls, sunrise is at 5:47 am and sunset at 9:30 pm MDT.

How many hours of sunshine does Thompson Falls have in May?

In Thompson Falls, the average sunshine duration in May is 9.8h.

What is the UV index reading in May in Thompson Falls?

In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMayJJASOND
Apr
May
Jun
Average high temperature
47.1°F 8.4°C
60.1°F 15.6°C
66.9°F 19.4°C
Average low temperature
27.9°F -2.3°C
34.3°F 1.3°C
40.3°F 4.6°C
Average pressure
30" 762mmHg
29.96" 761mmHg
29.93" 760mmHg
Average wind speed
4.9mph 7.9km/h
4.4mph 7.1km/h
4.7mph 7.6km/h
Average max. wind speed
5.3mph 8.5km/h
4.9mph 7.9km/h
5.2mph 8.4km/h
Average wind speed gusts
7.5mph 12.1km/h
6.8mph 10.9km/h
7mph 11.3km/h
Average humidity
81%
71%
67%
Average rainfall
2.24" 57mm
1.57" 40mm
1.3" 33mm
Average rainfall days
19.2
14.4
12.6
Average snowfall
2.17" 55mm
0.12" 3mm
0" 0mm
Average snowfall days
5.9
0.4
0
Average daylight
13h 4min
15h 1min
15h 5min
Average sunshine
7h 5min
9h 5min
10h 1min
Average sunshine days
7.9
14.2
15.8
Average UV index
2
4
4
Average cloud cover
49%
38%
34%
Average visibility
5mi 8km
5mi 8km
6mi 9.7km

Average temperature in May
Thompson Falls, MT

Average temperature in May - Thompson Falls, MT
  • Average high temperature in May: 60.1°F

The warmest months (with the highest average high temperature) are July and August (78.8°F).
The month with the lowest average high temperature is December (28.9°F).

  • Average low temperature in May: 34.3°F

The month with the highest average low temperature is August (45.7°F).
The coldest month (with the lowest average low temperature) is December (16.2°F).

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Average pressure in May
Thompson Falls, MT

Average pressure in May - Thompson Falls, MT
  • Average pressure in May: 29.96"Hg

The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in May
Thompson Falls, MT

Average wind speed in May - Thompson Falls, MT
  • Average wind speed in May: 4.4mph

The windiest month (with the highest average wind speed) is April (4.9mph).
The calmest month (with the lowest average wind speed) is December (4mph).

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Average humidity in May
Thompson Falls, MT

Average humidity in May - Thompson Falls, MT
  • Average humidity in May: 71%

The month with the highest relative humidity is January (93%).
The months with the lowest relative humidity are July and August (53%).

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Average rainfall in May
Thompson Falls, MT

Average rainfall in May - Thompson Falls, MT
  • Average rainfall in May: 1.57"

The wettest month (with the highest rainfall) is January (3.11").
The driest month (with the least rainfall) is August (0.39").

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Average rainfall days in May
Thompson Falls, MT

Average rainfall days in May - Thompson Falls, MT
  • Average rainfall days in May: 14.4 days

The month with the highest number of rainy days is March (19.9 days).
The month with the least rainy days is August (5.9 days).

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Average snowfall in May
Thompson Falls, MT

Average snowfall in May - Thompson Falls, MT
  • Average snowfall in May: 0.12"

The month with the highest snowfall is February (15.12").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in May
Thompson Falls, MT

Average snowfall days in May - Thompson Falls, MT
  • Average snowfall days in May: 0.4 days

The month with the highest number of snowfall days is December (20.4 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
Thompson Falls, MT

Average daylight in May / Average sunshine in May - Thompson Falls, MT
  • Average daylight in May: 15h and 1min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in May: 9h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

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Average sunshine days in May
Thompson Falls, MT

Average sunshine days in May - Thompson Falls, MT
  • Average sunshine days in May: 14.2 days

The months with the most sunshine days are July and August (23.3 days).
The month with the least sunshine days is March (5.8 days).

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Average UV index in May
Thompson Falls, MT

Average UV index in May - Thompson Falls, MT
  • 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
Thompson Falls, MT

Average cloud cover in May - Thompson Falls, MT
  • Average cloud cover in May: 38

The month with the most cloud cover is February (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 15).

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Average visibility in May
Thompson Falls, MT

Average visibility in May - Thompson Falls, MT
  • Average visibility in May: 5mi

The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February and December (3mi).

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Thompson Falls, Montana, USA

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