August weather forecast
Nashua, NH

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The arched Main Street Bridge crossing over the iconic Nashua River in New Hampshire
The arched Main Street Bridge crossing over the iconic Nashua River in New Hampshire

Weather in August

August in Nashua carries the summer season further with high temperatures nearly matching those in July at 80.2°F (26.8°C), while the low dips slightly to 60.1°F (15.6°C). A peculiar aspect of August is the increasing cloud cover, lending a unique charm to the otherwise bright summer skies. Sunshine continues to dominate, but daylight hours begin to decrease, marking the onset of the coming fall. The wind keeps its mild temperament and evenings continue to be pleasantly cool. Nashua stays vibrant with an array of outdoor festivities taking place across the city.

Temperature

As July transitions into August, the average high-temperature rests at a still warm 80.2°F (26.8°C), maintaining a close resemblance to the previous month. Nashua's nights in August experience an average temperature drop to a mild 60.1°F (15.6°C).

Humidity

In Nashua, the average relative humidity in August is 75%.

Rainfall

In Nashua, New Hampshire, during August, the rain falls for 9.4 days and regularly aggregates up to 0.55" (14mm) of precipitation. Throughout the year, there are 91.2 rainfall days, and 7.24" (184mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Nashua, New Hampshire.

Daylight

The average length of the day in August is 13h and 52min.
On the first day of August, sunrise is at 5:38 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 7:21 pm EDT.

Sunshine

The month with the most sunshine is August, with an average of 10.4h of sunshine.

UV index

The months with the highest UV index in Nashua are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A daily high UV index of 6 in August leads to these guidelines:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Nashua in August?

The average high-temperature and low-temperature in Nashua during August are 80.2°F (26.8°C) and 60.1°F (15.6°C) respectively. In July, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, is calculated to be 87.8°F (31°C).

What is the average humidity in August in Nashua?

In Nashua, the average relative humidity in August is 75%.

How many days does it rain in August in Nashua?

In August, in Nashua, the rain falls for 9.4 days. Throughout August, 0.55" (14mm) of precipitation is accumulated.

When it does not snow in Nashua?

June through September are months without snowfall.

What is the average length of the day in August in Nashua?

The average day length in August is 13h and 52min.

When are sunrise and sunset in August in Nashua?

In August, on the first day of the month, sunrise is at 5:38 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 7:21 pm EDT.

What month has the most sunshine in Nashua?

With an average of 10.4h of sunshine, August has the most sunshine of the year in Nashua.

How many hours of sunshine does Nashua have in August?

The average sunshine duration in August in Nashua, New Hampshire, is 10.4h.

What is the month with the highest UV index in Nashua?

The months with the highest UV index are June through August, with an average maximum UV index of 6.

What is the UV index reading in August in Nashua?

In Nashua, New Hampshire, the average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Nashua, NH

Average temperature in August - Nashua, NH
  • Average high temperature in August: 80.2°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (30.9°F).

  • Average low temperature in August: 60.1°F

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (18°F).

Average pressure in August
Nashua, NH

Average pressure in August - Nashua, NH
  • Average pressure in August: 29.97"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in August
Nashua, NH

Average wind speed in August - Nashua, NH
  • Average wind speed in August: 5.1mph

The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

Average humidity in August
Nashua, NH

Average humidity in August - Nashua, NH
  • Average humidity in August: 75%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (71%).

Average rainfall in August
Nashua, NH

Average rainfall in August - Nashua, NH
  • Average rainfall in August: 0.55"

The wettest month (with the highest rainfall) is November (0.79").
The driest month (with the least rainfall) is September (0.28").

Average rainfall days in August
Nashua, NH

Average rainfall days in August - Nashua, NH
  • Average rainfall days in August: 9.4 days

The month with the highest number of rainy days is June (10.4 days).
The month with the least rainy days is January (3.5 days).

Average snowfall in August
Nashua, NH

Average snowfall in August - Nashua, NH
  • Average snowfall in August: 0"

The months with the highest snowfall are February and December (1.26").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Nashua, NH

Average snowfall days in August - Nashua, NH
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (6.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Nashua, NH

Average daylight in August / Average sunshine in August - Nashua, NH
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in August: 10h and 2min

The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in August
Nashua, NH

Average sunshine days in August - Nashua, NH
  • Average sunshine days in August: 18.7 days

The month with the most sunshine days is January (22.6 days).
The month with the least sunshine days is July (17.3 days).

Average UV index in August
Nashua, NH

Average UV index in August - Nashua, NH
  • Average UV index in August: 6

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

Average cloud cover in August
Nashua, NH

Average cloud cover in August - Nashua, NH
  • Average cloud cover in August: 34

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).

Average visibility in August
Nashua, NH

Average visibility in August - Nashua, NH
  • Average visibility in August: 5mi

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

Nashua, New Hampshire, USA

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