Climate and monthly weather forecast
Calais, ME

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The climate of Calais

Calais, a city situated in Maine, USA, experiences a humid continental climate, designated as Dfb in the Köppen climate classification. This is characterized by no dry season and warm summers. A prominent feature of this locale is the continuously changing weather conditions throughout the year. The monthly averages for several climate parameters show clear fluctuations, demonstrating the diversity of this area's weather.

Temperatures in Calais range from chilling lows of 13.8°F (-10.1°C) in January to highs reaching 74.8°F (23.8°C) in July. This broad temperature spectrum distinctly outlines the shift from winter chill to summer warmth. The humidity remains more or less consistent throughout the year, hovering between 78% and 87%. This consistency correlates with the category of the climate, which does not include a dry season.

Rainfall and snowfall figures also reveal noteworthy patterns. The highest amount of rainfall is recorded in December, reaching up to 3.7" (94mm), while the driest month of August sees a drop to 1.77" (45mm). Meanwhile, snowfall figures peak in January at 7.44" (189mm) and drop off in May, with no traces of snow recorded from June to September. The daylight span stretches from a minimum of 8.8 hours in December to a maximum of 15.6 hours in June, highlighting the city's position in the higher latitudes.

Wind speeds fluctuate modestly across the year, reaching a peak velocity of 9.3mph (15km/h) in March and dropping to a low of 6.1mph (9.8km/h) in August. In terms of atmospheric pressure, measures continuously hover around the 29.9" (759mm) mark throughout the year. These sets of data, alongside other meteorological indicators, depict Calais as having very dynamic and seasonally diverse weather conditions.

The Best Time to Visit Calais

Preferable times to visit Calais would undoubtedly be the milder months when temperatures are more comfortable. Between May and September, temperatures range from 47.8°F (8.8°C) to 74.3°F (23.5°C), making it the ideal period for outdoor activities. The comfortable temperatures, coupled with moderate humidity levels, create a pleasant environment for tourists. Moreover, daylight hours extend from 13.5 hours in April up to 15.2 hours in July, allowing for more daylight to engage in sightseeing and activities.

The Worst Time to Visit Calais

The winter months from December to February, characterized by substantial snowfall and very low temperatures spanning from 13.8°F (-10.1°C) to 28.8°F (-1.8°C), would be a challenging time for visitors unaccustomed to harsh winters. Apart from dealing with chilling cold, the daylight hours also significantly drop during these winter months, resulting in relatively shorter daylight hours. Therefore, outdoor activities become limited.

Spring Weather in Calais

During the spring months, from March to May, Calais witnesses the transition from winter's end to the beginning of the warm season. During this time, temperatures slowly start to rise, achieving an average high of 59.4°F (15.2°C) by the end of May. However, the springtime also marks a period of relatively high precipitation, with rainfall averaging 3.27" (83mm) in April. Winds strengthen slightly, with average wind speeds reaching up to 9.3mph (15km/h) in March.

Summer Weather in Calais

Summers in Calais, from June to August, showcase degrees of warmth tempered by the coastal influence. Temperatures peak in July, averaging high of 74.8°F (23.8°C), and humidity remains fairly consistent. The summer months also bring extended daylight hours, with up to 15.6 hours of daylight in June. Winds slightly decelerate, with the lowest average speed of 6.1mph (9.8km/h) in August.

Autumn Weather in Calais

Autumn in Calais is from September to November. This period signals the transition from summer heat to the chill of winter. Temperatures gradually fall, reaching an average low of 31.3°F (-0.4°C) in November. Rainfall increases during autumn, reaching a peak of 3.27" (83mm) in November while wind speeds show a moderate increase, with an average of 7.8mph (12.6km/h) in October.

Winter Weather in Calais

The winter months in Calais, December through February, are characterized by significant cold and extensive snowfall. January emerges as the coldest month, with temperatures plummeting to an average low of 13.8°F (-10.1°C). Snowfall reaches its maximum in January, recording 7.44" (189mm), while winds reach their highest average speeds, peaking at 9.1mph (14.6km/h) in December. Winter is also characterized by shorter days with fewer daylight hours, limiting the scope for outdoor activities.

Weather in January

January in Calais, Maine marks the onset of winter, promising cold, icy days. Average temperatures range from 13.8°F (-10.1°C) to 26.6°F (-3°C), presenting quite harsh conditions. This drop in temperature sees an increase in snowfall, transforming the city into a winter wonderland. Weather in January »

Weather in February

Moving into February, temperatures in Calais marginally rise though the chill of winter remains prevalent. February sees the winter at its peak, more snow, cloud cover and icy winds than January. With the UV Index at 2 and visibility of 5 miles, this month is suitable for outdoor pursuits benefiting from the winter conditions. Weather in February »

Weather in March

March heralds the transition from winter to spring, with temperatures ranging from 21.9°F (-5.6°C) to 36.1°F (2.3°C). The snowfall days reduce to 13.2, indicating a significant decrease in the intensity of winter weather. As the clouds start to disappear, the city basks in longer periods of daylight averaging at 12 hours. Weather in March »

Weather in April

April in Calais marks the official arrival of the spring, significantly shifting the weather parameters. The gradually improving temperatures and longer daylight hours allow residents to engage in outdoor activities. The city experiences 17.2 days of rainfall, bringing freshness and stirring the blossoming of spring flowers. Weather in April »

Weather in May

May brings a significant rise in temperature, paving the way for warmer conditions in Calais. Devoid of snowfall, the city experiences mild and pleasant weather, perfect for exploration and outdoor activities. Encouraged by 14.9 hours of daylight, the city turns livelier. Weather in May »

Weather in June

June signals the beginning of the summer season, featuring balmy weather and extended daylight. Average temperatures further escalate and provide the opportunity for more outdoor ventures. Nature is at its full bloom, benefiting from the plentiful sunshine averagely lasting for 8.3 hours per day. Weather in June »

Weather in July

July is the peak of the summer in Calais, boasting the highest temperatures of the year with averages from 56.8°F (13.8°C) to 74.8°F (23.8°C). This substantial surge in temperature is complemented by the longest daylight hours, typically 15.2 in total. Weather in July »

Weather in August

In August, Calais experiences sultry weather, with high temperatures nearly as hot as July. The summer heat lingers, and the city continues to enjoy extended daylight hours and frequent sunny spells. With the decrease in rainfall, August becomes the driest month of the year, recording just 1.77" (45mm) of rain. Weather in August »

Weather in September

September sees a transition from summer to autumn, introducing milder weather. Lowering temperatures and slight increase in rainfall marks the beginning of fall weather. The summer heat starts to recede, giving way to the cool, crisp aura of autumn. Weather in September »

Weather in October

October ushers in distinct autumn weather with average temperatures dropping from 66.9°F (19.4°C) to 55.2°F (12.9°C). As the leaves change hues, Calais gets cloaked in vibrant shades of fall, creating a picturesque setting. Weather in October »

Weather in November

November in Calais heralds the beginning of colder months, as the city prepares for the coming winter. Decreasing daylight hours and plummeting temperatures characterize this month as autumn fades into winter. Less sunshine and more cloud cover significantly drop the temperatures as the season changes. Weather in November »

Weather in December

The arrival of December in Calais marks the return of the winter, bringing along with it cold temperatures and snowy landscapes. Average temperatures range between 21.9°F (-5.6°C) and 32.7°F (0.4°C), a clear indication of the upcoming frigid weather. Weather in December »
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Frequently asked questions

What month is the coldest in Calais?

January is Calais's coldest month, registering average high temperatures of 26.6°F (-3°C) and lows of 13.8°F (-10.1°C).

How much does it rain in Calais?

Throughout the year, in Calais, there are 155.3 rainfall days, and 32.48" (825mm) of precipitation is accumulated.

When does it snow in Calais?

January through May, October through December are months with snowfall.

When does it snow the most in Calais?

The month with the most snowfall in Calais, Maine, is January, when snow falls for 15.2 days and typically aggregates up to 7.44" (189mm) of snow.

How much does it snow in Calais?

Throughout the year, there are 64.6 snowfall days, and 30.47" (774mm) of snow is accumulated.

What are the months with the lowest UV index in Calais?

The months with the lowest UV index in Calais are January through March, November and December, with an average maximum UV index of 2.

What is the most humid month in Calais?

The most humid month is February, with an average relative humidity of 87%.

What is the month with the least sunshine in Calais?

February has the least sunshine of the year in Calais, with an average of 3.4h of sunshine.

When is Daylight Saving Time (DST) in Calais?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Calais, Maine, and the time zone changes from AST to ADT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from ADT to AST.

What is the least humid month in Calais?

The least humid month in Calais is May, with an average relative humidity of 78%.

When it does not snow in Calais?

June through September are months without snowfall in Calais.

When are the longest days in Calais?

The month with the longest days is June, with an average of 15h and 36min of daylight.

When is the highest UV index in Calais?

June through August, with an average maximum UV index of 5, are months with the highest UV index.

What time of the year is the hottest in Calais?

July is the warmest month in Calais, Maine, exhibiting average temperatures of 74.8°F (23.8°C) at the peak and 56.8°F (13.8°C) at the base.

What is the driest month in Calais?

August is the month with the least rainfall in Calais, Maine. Rain falls for 12.6 days and accumulates 1.77" (45mm) of precipitation.

What month has the most sunshine in Calais?

August has the most sunshine of the year in Calais, Maine, with an average of 9.8h of sunshine.

What is the wettest month in Calais?

December is the month with the most rainfall. Rain falls for 12.5 days and accumulates 3.7" (94mm) of precipitation.

What is the month with the shortest days in Calais?

The month with the shortest days in Calais is December, with an average of 8h and 48min of daylight.

Average temperature
Calais, ME

Average temperature - Calais, ME

The warmest month (with the highest average high temperature) is July (74.8°F).
The month with the lowest average high temperature is January (26.6°F).

The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (13.8°F).

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Average pressure
Calais, ME

Average pressure - Calais, ME

The month with the highest atmospheric pressure is September (30.03"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed
Calais, ME

Average wind speed - Calais, ME

The windiest month (with the highest average wind speed) is March (9.3mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

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Average rainfall
Calais, ME

Average rainfall - Calais, ME

The wettest month (with the highest rainfall) is December (3.7").
The driest month (with the least rainfall) is August (1.77").

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Average rainfall days
Calais, ME

Average rainfall days - Calais, ME

The month with the highest number of rainy days is April (17.2 days).
The month with the least rainy days is February (7.8 days).

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Average snowfall
Calais, ME

Average snowfall - Calais, ME

The month with the highest snowfall is January (7.44").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Calais, ME

Average snowfall days - Calais, ME

The month with the highest number of snowfall days is January (15.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Calais, ME

Average daylight / Average sunshine - Calais, ME

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).

The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).

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Average sunshine days
Calais, ME

Average sunshine days - Calais, ME

The month with the most sunshine days is September (16.6 days).
The month with the least sunshine days is April (8.5 days).

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Average UV index
Calais, ME

Average UV index - Calais, ME

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average visibility
Calais, ME

Average visibility - Calais, ME

The months with the highest visibility are May, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, June, July, August and September (5mi).

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Calais, Maine, USA

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