May weather forecast
Riggins, ID

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The scenic Snake River between large mountains, with pitched tents and visible footpaths in the mountains near Riggins, Idaho
The scenic Snake River between large mountains, with pitched tents and visible footpaths in the mountains near Riggins, Idaho

Weather in May

May weather in Riggins is markedly warmer, signifying a well-established spring. This is the season when greenery flourishes, augmented by periods of rain. The jump to June's weather has May setting up the hot and dry conditions predominant in summer. Distinctively, May exhibits a substantial decrease in snowfall, diminishing from 11.5" (292mm) down to 6.02" (153mm). This trend paints a clear picture of winter receding, making way for warmer months.

Temperature

An upsurge in temperatures occurs in Riggins as April gives way to May, with average highs shifting from a wintry 41.7°F (5.4°C) to a cool 53.6°F (12°C). Riggins, after an intense day, registers a significant cooling to an average low-temperature of 31.6°F (-0.2°C) throughout May.

Humidity

In May, the average relative humidity is 75%.

Rainfall

In Riggins, Idaho, in May, it is raining for 15.3 days, with typically 3.39" (86mm) of accumulated precipitation. Throughout the year, in Riggins, there are 81 rainfall days, and 32.68" (830mm) of precipitation is accumulated.

Snowfall

January through December are months with snowfall. In Riggins, in May, snow falls for 11.5 days, with typically accumulated 11.5" (292mm) of snow. Throughout the year, in Riggins, there are 160 snowfall days, and 210.63" (5350mm) of snow is accumulated.

Daylight

In May, the average length of the day in Riggins is 14h and 55min.
On the first day of the month, sunrise is at 5:32 am and sunset at 7:52 pm. On the last day of May, sunrise is at 5:00 am and sunset at 8:26 pm PDT.

Sunshine

In Riggins, the average sunshine in May is 8.7h.

UV index

The average daily maximum UV index in May is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index of 3 during May leads to these instructions:
Prioritize safety - Recommendations to avert sunburn are shared. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
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Frequently asked questions

What is the average May temperature in Riggins?

The high-temperature, in May, in Riggins, is 53.6°F (12°C), while the low-temperature averages to 31.6°F (-0.2°C).

What is the average humidity in May in Riggins?

The average relative humidity in May is 75%.

How much does it rain in Riggins in May?

In May, the rain falls for 15.3 days. Throughout May, 3.39" (86mm) of precipitation is accumulated.

How much does it snow in Riggins in May?

In Riggins, Idaho, during May, snow falls for 11.5 days and regularly aggregates up to 11.5" (292mm) of snow.

How many hours of daylight does Riggins have in May?

In May, the average day length in Riggins, Idaho, is 14h and 55min.

When are sunrise and sunset in May in Riggins?

In May, on the first day of the month, sunrise is at 5:32 am and sunset at 7:52 pm. On the last day of the month, in Riggins, Idaho, sunrise is at 5:00 am and sunset at 8:26 pm PDT.

How long on average sun shines in May in Riggins?

In Riggins, Idaho, the average sunshine duration in May is 8.7h.

What is the UV index reading in May in Riggins?

In Riggins, the average daily maximum UV index in May is 3. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Riggins, ID

Average temperature in May - Riggins, ID
  • Average high temperature in May: 53.6°F

The warmest months (with the highest average high temperature) are July and August (75.7°F).
The month with the lowest average high temperature is December (25.3°F).

  • Average low temperature in May: 31.6°F

The month with the highest average low temperature is August (45.7°F).
The coldest month (with the lowest average low temperature) is January (12°F).

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Average pressure in May
Riggins, ID

Average pressure in May - Riggins, ID
  • Average pressure in May: 29.95"Hg

The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in May
Riggins, ID

Average wind speed in May - Riggins, ID
  • Average wind speed in May: 5.3mph

The windiest month (with the highest average wind speed) is March (6mph).
The calmest months (with the lowest average wind speed) are May, June, August and September (5.3mph).

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Average humidity in May
Riggins, ID

Average humidity in May - Riggins, ID
  • Average humidity in May: 75%

The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is August (48%).

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Average rainfall in May
Riggins, ID

Average rainfall in May - Riggins, ID
  • Average rainfall in May: 3.39"

The wettest month (with the highest rainfall) is February (4.49").
The driest month (with the least rainfall) is July (0.51").

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Average rainfall days in May
Riggins, ID

Average rainfall days in May - Riggins, ID
  • Average rainfall days in May: 15.3 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (1.8 days).

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Average snowfall in May
Riggins, ID

Average snowfall in May - Riggins, ID
  • Average snowfall in May: 11.5"

The month with the highest snowfall is February (36.1").
The month with the least snowfall is August (0.08").

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Average snowfall days in May
Riggins, ID

Average snowfall days in May - Riggins, ID
  • Average snowfall days in May: 11.5 days

The month with the highest number of snowfall days is March (24.9 days).
The month with the least snowfall days is August (0.3 days).

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Average daylight in May /
Average sunshine in May
Riggins, ID

Average daylight in May / Average sunshine in May - Riggins, ID
  • Average daylight in May: 14h and 5min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in May: 8h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).

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Average sunshine days in May
Riggins, ID

Average sunshine days in May - Riggins, ID
  • Average sunshine days in May: 8.6 days

The month with the most sunshine days is July (22.3 days).
The months with the least sunshine days are February and March (6.3 days).

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Average UV index in May
Riggins, ID

Average UV index in May - Riggins, ID
  • Average UV index in May: 3

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, November and December (UV index 1).

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Average cloud cover in May
Riggins, ID

Average cloud cover in May - Riggins, ID
  • Average cloud cover in May: 44

The month with the most cloud cover is February (Cloud cover 73).
The month with the least cloud cover is August (Cloud cover 13).

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Average visibility in May
Riggins, ID

Average visibility in May - Riggins, ID
  • Average visibility in May: 5mi

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

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Riggins, Idaho, USA

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