Climate and monthly weather forecast
Harwich, MA

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Weather in January

January, like December, in Harwich, Massachusetts, is a wintry winter month, with temperature in the range of an average low of 31.6°F (-0.2°C) and an average high of 39°F (3.9°C). January and February mark Harwich's lowest temperatures, averaging a high-temperature of 39°F (3.9°C). Weather in January »

Weather in February

February, the last month of the winter in Harwich, is also a wintry month, with an average temperature fluctuating between 39°F (3.9°C) and 32°F (0°C). January and February are characterised by lowest temperatures, with an average high of 39°F (3.9°C). Weather in February »

Weather in March

March, the first month of the spring in Harwich, is still a cold month, with an average temperature fluctuating between 35.4°F (1.9°C) and 41°F (5°C). In March, Harwich's weather conditions record an average high-temperature of a still cold 41°F (5°C), demonstrating little divergence from the preceding month. Weather in March »

Weather in April

April is a frosty spring month in Harwich, Massachusetts, with an average temperature ranging between min 42.4°F (5.8°C) and max 46.9°F (8.3°C). April's arrival signals a subtle increase in average high-temperatures, moving from March's wintry 41°F (5°C) to a frosty 46.9°F (8.3°C). Weather in April »

Weather in May

May, the last month of the spring in Harwich, is a cool month, with an average temperature ranging between max 54.3°F (12.4°C) and min 50.5°F (10.3°C). With the onset of May, Harwich's average high-temperature experiences a slight rise, moving from April's chilly 46.9°F (8.3°C) to a cool 54.3°F (12.4°C). Weather in May »

Weather in June

The first month of the summer, June, is a refreshing month in Harwich, Massachusetts, with an average temperature fluctuating between 58.8°F (14.9°C) and 63°F (17.2°C). As June arrives, Harwich's weather shows a minor increase in high-temperatures, edging from May's fresh 54.3°F (12.4°C) to an enjoyable 63°F (17.2°C). Weather in June »

Weather in July

July in Harwich, Massachusetts, is a pleasant summer month, with an average temperature varying between 67.1°F (19.5°C) and 70.3°F (21.3°C). Observing a slight rise in July, the average high-temperature shifts from June's enjoyable 63°F (17.2°C) to an agreeable 70.3°F (21.3°C). Weather in July »

Weather in August

The last month of the summer, August, is another pleasant month in Harwich, Massachusetts, with temperature in the range of an average high of 71.6°F (22°C) and an average low of 68.2°F (20.1°C). August is the month when Harwich experiences its warmest temperatures, averaging a high of 71.6°F (22°C) and a low of 68.2°F (20.1°C). Weather in August »

Weather in September

September, the first month of the autumn in Harwich, is still a comfortable month, with an average temperature varying between 63.3°F (17.4°C) and 66.6°F (19.2°C). During September, Harwich observes a subtle ascent to a comfortable 66.6°F (19.2°C) from August's 71.6°F (22°C) in the average high-temperature. Weather in September »

Weather in October

October, like September, is a moderate autumn month in Harwich, Massachusetts, with an average temperature ranging between max 59.5°F (15.3°C) and min 54.9°F (12.7°C). The arrival of October correlates with a minor temperature reduction, down from September's enjoyable 66.6°F (19.2°C) to a still refreshing 59.5°F (15.3°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a fresh month in Harwich, Massachusetts, with an average temperature ranging between max 51.3°F (10.7°C) and min 45.5°F (7.5°C). The onset of November is marked by a minor decrease in temperature, transitioning from a refreshing 59.5°F (15.3°C) in October to a cool 51.3°F (10.7°C). Weather in November »

Weather in December

December, the first month of the winter in Harwich, is also a frosty month, with temperature in the range of an average low of 37.6°F (3.1°C) and an average high of 44.4°F (6.9°C). Harwich's December weather features a light decline in high-temperatures, reducing from a fresh 51.3°F (10.7°C) in November to a frosty 44.4°F (6.9°C). Weather in December »

Frequently asked questions

What part of the year is the coldest in Harwich?

Harwich's coldest months, January and February, record an average high-temperature of 39°F (3.9°C).

How much does it rain?

In Harwich, during the entire year, the rain falls for 142.4 days and collects up to 22.09" (561mm) of precipitation.

When does it snow?

Months with snowfall are January through April, November and December.

How much does it snow?

Throughout the year, there are 20.8 snowfall days, and 4.37" (111mm) of snow is accumulated.

What are the months with the lowest UV index?

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

What is the snowiest month?

February is the month with the most snowfall. Snow falls for 5 days and accumulates 1.38" (35mm) of snow.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

When it does not snow?

In Harwich, snow does not fall in May through October.

What are the most humid months in Harwich?

The months with the highest humidity are June and July, with an average relative humidity of 85%.

When are the longest days?

With an average of 15h and 12min of daylight, June has the longest days of the year.

When is the highest UV index?

The months with the highest UV index in Harwich are July and August, with an average maximum UV index of 6.

What are the warmest months?

In Harwich, August is known for its average highest temperatures, reaching a high of 71.6°F (22°C) and a low of 68.2°F (20.1°C).

What month has the most sunshine in Harwich?

With an average of 10.7h of sunshine, August has the most sunshine of the year.

What is the wettest month?

The month with the most rainfall is October, when the rain falls for 13.4 days and typically aggregates up to 2.83" (72mm) of precipitation.

What is the least humid month?

The least humid month is November, with an average relative humidity of 74%.

What is the driest month?

November is the month with the least rainfall. Rain falls for 11.5 days and accumulates 1.46" (37mm) of precipitation.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 12min of daylight.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 4.3h of sunshine.

Average temperature
Harwich, MA

Average temperature - Harwich, MA

The warmest month (with the highest average high temperature) is August (71.6°F).
The months with the lowest average high temperature are January and February (39°F).

The month with the highest average low temperature is August (68.2°F).
The coldest month (with the lowest average low temperature) is January (31.6°F).

Average pressure
Harwich, MA

Average pressure - Harwich, MA

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed
Harwich, MA

Average wind speed - Harwich, MA

The windiest month (with the highest average wind speed) is January (18mph).
The calmest month (with the lowest average wind speed) is August (11.4mph).

Average humidity
Harwich, MA

Average humidity - Harwich, MA

The months with the highest relative humidity are June and July (85%).
The month with the lowest relative humidity is November (74%).

Average rainfall
Harwich, MA

Average rainfall - Harwich, MA

The wettest month (with the highest rainfall) is October (2.83").
The driest month (with the least rainfall) is November (1.46").

Average rainfall days
Harwich, MA

Average rainfall days - Harwich, MA

The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is February (8.3 days).

Average snowfall
Harwich, MA

Average snowfall - Harwich, MA

The month with the highest snowfall is February (1.38").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days
Harwich, MA

Average snowfall days - Harwich, MA

The month with the highest number of snowfall days is January (6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight / Average sunshine
Harwich, MA

Average daylight / Average sunshine - Harwich, MA

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).

Average sunshine days
Harwich, MA

Average sunshine days - Harwich, MA

The month with the most sunshine days is August (17.6 days).
The month with the least sunshine days is January (13 days).

Average UV index
Harwich, MA

Average UV index - Harwich, MA

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average visibility
Harwich, MA

Average visibility - Harwich, MA

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

Harwich, Massachusetts, USA

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