May weather forecast
Caribou, ME

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Weather in May

In May, Caribou's weather warms significantly with temperatures potentially reaching a comfortable 60.1°F (15.6°C) during the day. The city transitions from a snow-covered landscape to lush greenery. The rainfall is not particularly high, but combined with the melting snow, the environment becomes lush and verdant. The local flora awakens, making Caribou a beautiful, colorful place to live and visit during this month.

Temperature

May in Caribou signals a significant shift in the average high-temperature, soaring from April's chilly 43.2°F (6.2°C) to a moderate 60.1°F (15.6°C). In the month of May, an average of 40.8°F (4.9°C) marks the low-temperature.

Humidity

May is the least humid month in Caribou, with an average relative humidity of 75%.

Rainfall

In May, the rain falls for 16.7 days. Throughout May, 2.87" (73mm) of precipitation is accumulated. In Caribou, during the entire year, the rain falls for 144 days and collects up to 32.95" (837mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.9 snowfall days, in May, Caribou aggregates 0.55" (14mm) of snow. In Caribou, during the entire year, snow falls for 104.9 days and aggregates up to 73.35" (1863mm) of snow.

Daylight

The average length of the day in May is 15h and 4min.
On the first day of the month, sunrise is at 5:15 am and sunset at 7:42 pm. On the last day of May, sunrise is at 4:41 am and sunset at 8:18 pm EDT.

Sunshine

In Caribou, the average sunshine in May is 7.3h.

UV index

In May, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In May, the maximum UV index of 4 suggests this advice:
Undertake protective steps - Recommendations to avoid sunburn are issued. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.

Frequently asked questions

What is the average May temperature?

In Caribou, 60.1°F (15.6°C) is the average high-temperature and 40.8°F (4.9°C) is the average low-temperature during May.

What is the least humid month?

May is the least humid month, with an average relative humidity of 75%.

What is the average humidity in May?

In Caribou, the average relative humidity in May is 75%.

How many days does it rain in May?

In Caribou, during May, the rain falls for 16.7 days and regularly aggregates up to 2.87" (73mm) of precipitation.

What is the last month it snows?

May is the last month it regularly snows. During 0.9 snowfall days, in May, Caribou aggregates 0.55" (14mm) of snow.

What is the average length of the day in May?

In May, the average day length is 15h and 4min.

When is the sunrise / sunset in May?

On the first day of May, sunrise is at 5:15 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 4:41 am and sunset at 8:18 pm EDT.

How long on average sun shines in May?

In Caribou, the average sunshine duration in May is 7.3h.

How high is the UV index in May?

In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health risk 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
Caribou, ME

Average temperature in May - Caribou, ME
  • Average high temperature in May: 60.1°F

The warmest month (with the highest average high temperature) is July (75°F).
The month with the lowest average high temperature is January (19.4°F).

  • Average low temperature in May: 40.8°F

The month with the highest average low temperature is July (54.7°F).
The coldest month (with the lowest average low temperature) is January (4.3°F).

Average pressure in May
Caribou, ME

Average pressure in May - Caribou, ME
  • Average pressure in May: 29.97"Hg

The month with the highest atmospheric pressure is September (30.02"Hg).
The months with the lowest atmospheric pressure are June and July (29.89"Hg).

Average wind speed in May
Caribou, ME

Average wind speed in May - Caribou, ME
  • Average wind speed in May: 7.8mph

The windiest months (with the highest average wind speed) are February and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

Average humidity in May
Caribou, ME

Average humidity in May - Caribou, ME
  • Average humidity in May: 75%

The months with the highest relative humidity are February and March (93%).
The month with the lowest relative humidity is May (75%).

Average rainfall in May
Caribou, ME

Average rainfall in May - Caribou, ME
  • Average rainfall in May: 2.87"

The wettest month (with the highest rainfall) is April (3.46").
The driest month (with the least rainfall) is February (2.2").

Average rainfall days in May
Caribou, ME

Average rainfall days in May - Caribou, ME
  • Average rainfall days in May: 16.7 days

The month with the highest number of rainy days is June (16.9 days).
The month with the least rainy days is January (4.2 days).

Average snowfall in May
Caribou, ME

Average snowfall in May - Caribou, ME
  • Average snowfall in May: 0.55"

The month with the highest snowfall is January (15.91").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in May
Caribou, ME

Average snowfall days in May - Caribou, ME
  • Average snowfall days in May: 0.9 days

The month with the highest number of snowfall days is February (21 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Caribou, ME

Average daylight in May / Average sunshine in May - Caribou, ME
  • Average daylight in May: 15h and 1min

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

  • Average sunshine in May: 7h and 2min

The month with the most sunshine is August (Average sunshine: 9h and 24min).
The month with the least sunshine is February (Average sunshine: 2h and 6min).

Average sunshine days in May
Caribou, ME

Average sunshine days in May - Caribou, ME
  • Average sunshine days in May: 12.3 days

The month with the most sunshine days is September (14.7 days).
The month with the least sunshine days is February (7.8 days).

Average UV index in May
Caribou, ME

Average UV index in May - Caribou, ME
  • Average UV index in May: 4

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

Average cloud cover in May
Caribou, ME

Average cloud cover in May - Caribou, ME
  • Average cloud cover in May: 54

The month with the most cloud cover is February (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 43).

Average visibility in May
Caribou, ME

Average visibility in May - Caribou, ME
  • Average visibility in May: 6mi

The month with the highest visibility is May (6mi).
The months with the lowest visibility are January, February, March, April and December (4mi).

Caribou, Maine, USA

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