Climate and monthly weather forecastNashua, NH
Climate and monthly weather forecast
The climate of Nashua
The thriving city of Nashua finds itself comfortably positioned in New Hampshire, USA, subjected to a Humid continental climate, known under Köppen classification as Dfb, characterized by no dry season and warm summers. This particular classification signifies a significant variation in temperatures and precipitation throughout the year.Examining the prevailing data, it becomes evident that the climate in Nashua exhibits a broad range of temperatures, reaching their zenith in July with approximately 82°F (27.8°C), while plummeting to the low twenties in January. Reinforcing this trend of temperature divergence is the relative humidity, consistently residing in mid-70s to low 80s percentages throughout the year.
Manifesting its Humid continental demeanor, the city witnesses rainfall distributed evenly throughout the year. The most substantial showers grace the city between June and November, with the heaviest precipitation occurring in the month of November, registering approximately 0.79" (20mm). A unique attribute of Nashua's weather pattern emerges in the form of snowfall, frequenting the city between the months of January and March, as well as in November and December. The heaviest snowfall is typically observed in January and December, both months recording over an inch of snow.
The Best Time to Visit Nashua
Given the variety of climatic conditions Nashua experiences, the best time to visit largely depends on the individual visitor's preferences and the activities they wish to pursue. For those who enjoy milder temperatures and wish to engage in outdoor recreational activities, May through September offers the most favorable weather, with temperatures progressively increasing from a comfortable 55.2°F (12.9°C) to 82°F (27.8°C), and dropping to a manageable 67.3°F (19.6°C) in September. During these months, the city gets around 8.5 hours to 10.4 hours of sunshine daily, providing ample daylight for exploration.The Worst Time to Visit Nashua
Travelers wary of cold temperatures might find the frigid winter months, particularly January and February, less inviting. These months not only register the lowest temperatures, dipping below 20°F (-6.7°C), but also exhibit increased snowfall, often exceeding an inch. Furthermore, the daylight hours get significantly reduced, stretching only from 9.1 hours to 10.6 hours.Spring Weather in Nashua
Spring signals a period of transition for Nashua, experiencing a gradual climb in temperatures from 41.5°F (5.3°C) in March to a pleasing 67.3°F (19.6°C) by May. Accompanying the ascending temperatures is a minor increase in the precipitation level, culminating to approximately 0.63" (16mm) by May. This period also brings in prolonged daylight hours, increasing from 12 hours to 14.7 hours, allowing residents and visitors more time to enjoy the blooming landscape.Summer Weather in Nashua
Summer in Nashua brings about warm temperatures, hitting their peak in July and August, with an average of approximately 82°F (27.8°C) and 80.2°F (26.8°C) respectively. Interestingly, these months also record slightly increased precipitation levels, peaking around 0.71" (18mm). However, the increased rainfall does not dampen the sunny disposition of summer, as the sunshine duration still averages from 15.3 hours to 13.9 hours daily.Autumn Weather in Nashua
Signaling a cooldown from the summer heat, autumn months in Nashua begin with relatively high temperatures of 72.5°F (22.5°C) in September, which then gradually decline to a chilly 47.3°F (8.5°C) in November. Consistent with the falling temperatures is the drop in the daylight duration, decreasing from 12.5 hours to less than 10 hours daily. Meanwhile, precipitation levels see a small surge, reaching a high of 0.79" (20mm) by November.Winter Weather in Nashua
Winter months in Nashua are accompanied by chilly temperatures, with the city experiencing its coldest month in January with temperatures as low as 18°F (-7.8°C). The city also witnesses increased snowfall during these months, with January and December experiencing in excess of an inch. Despite the cold and snowy conditions, Nashua offers a flurry of winter activities, making it a charming, if chilly, winter destination.Weather in January
January in Nashua, New Hampshire brings chilly weather with average high temperatures reaching 30.9°F (-0.6°C), while the mercury drops as low as 18°F (-7.8°C) during the evening hours. As Nashua moves deeper into winter, it experiences increasing snowfalls, transforming the city into a winter wonderland. Weather in January »Weather in February
The weather in February in Nashua presents a continuation of the freezing winter temperature with a slight increase in the average high to 33.8°F (1°C) and the low at 18.9°F (-7.3°C). The city remains ensnared in the clutch of winter, yet the amount of sunshine begins to incrementally increase compared to January, hinting at the distant arrival of spring. Weather in February »Weather in March
March in Nashua marks the transitionary phase from Winter to Spring, with the daytime temperature reaching up to 41.5°F (5.3°C) and the nighttime temperature dropping to 27°F (-2.8°C). The city begins to thaw as the ice and snow retreat, gradually replaced by increasing frequency of rainfall. Weather in March »Weather in April
The shift to spring weather becomes more apparent in April, as Nashua experiences a significant jump in the average high temperature to 55.2°F (12.9°C) and a low of 37.6°F (3.1°C). As snowfall nearly ceases and is replaced by rainfall, the city's environment becomes increasingly vibrant with blooming flowers. Weather in April »Weather in May
The arrival of May in Nashua signifies the advent of true spring weather, characterized by an average high temperature of 67.3°F (19.6°C) and an agreeable low of 47.5°F (8.6°C). Torrents of rain dissipate, taking a back seat to pleasant, sun-filled days. Weather in May »Weather in June
Summertime is pronounced in Nashua during June with average high temperatures reaching a comfortable 75°F (23.9°C), while nights are cooler at 54.7°F (12.6°C). This is the month when the city witnesses a slight uptick in humidity, signaling the arrival of a classic New England summer. Weather in June »Weather in July
As the peak of summer, July in Nashua experiences the hottest average high temperature of the year at 82°F (27.8°C) and a nighttime temperature of 61.5°F (16.4°C). Extended hours of daylight, coupled with reduced cloud cover, make for the sunniest days of the year. Weather in July »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. Weather in August »Weather in September
The autumn equinox in September signals the commencement of fall in Nashua, reflected by a considerable drop in the daytime temperature to 72.5°F (22.5°C) and the temperature at night to 53.8°F (12.1°C). With falling leaves painting the city's trees in shades of red, orange, and yellow, the cityscape of Nashua is nothing short of a picturesque scene. Weather in September »Weather in October
October brings a further decline in temperature in Nashua, with the high averaging 59.5°F (15.3°C) and the low at 44.4°F (6.9°C). A prominent characteristic of this month is the increasingly short days, indicating the nearing winter. Weather in October »Weather in November
With November comes the undeniable transition to winter in Nashua, noticeable by the sharp drop in temperatures, with the high reaching only 47.3°F (8.5°C) and the low plunging to 34°F (1.1°C). Autumn leaves give way to barren tree branches as the city prepares for the onset of winter. Weather in November »Weather in December
Finally, December signifies the full swing of winter weather in Nashua, with an average high temperature of 36.5°F (2.5°C) and a low of 25.7°F (-3.5°C). In addition to the dip in temperatures, the amount of snowfall also experiences a notable increase. Weather in December »Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Nashua's coldest weather arrives in January, when temperatures average a high of 30.9°F (-0.6°C) and a low of 18°F (-7.8°C).
Throughout the year, there are 91.2 rainfall days, and 7.24" (184mm) of precipitation is accumulated.
Months with snowfall are January through May, October through December.
Throughout the year, in Nashua, New Hampshire, there are 25 snowfall days, and 5.91" (150mm) of snow is accumulated.
The months with the lowest UV index in Nashua, New Hampshire, are January, February, November and December, with an average maximum UV index of 2.
With an average relative humidity of 82%, February is the most humid month.
The months with the most snowfall in Nashua, New Hampshire, are February and December, with an average 1.26" (32mm) of accumulated snow.
The month with the least sunshine is February, with an average of 4.6h of sunshine.
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.
April is the least humid month in Nashua, with an average relative humidity of 71%.
In Nashua, New Hampshire, snow does not fall in June through September.
June has the longest days of the year, with an average of 15h and 18min of daylight.
June through August, with an average maximum UV index of 6, are months with the highest UV index in Nashua.
July, characterized by an average high temperature of 82°F (27.8°C) and a low temperature of 61.5°F (16.4°C), is generally the warmest month in Nashua, New Hampshire.
With an average of 10.4h of sunshine, August has the most sunshine of the year in Nashua, New Hampshire.
September is the month with the least rainfall. Rain falls for 7 days and accumulates 0.28" (7mm) of precipitation.
The month with the most rainfall in Nashua is November, when the rain falls for 5.7 days and typically aggregates up to 0.79" (20mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 6min of daylight.
Average temperature
Nashua, NH
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).
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
Nashua, NH
- Average pressure in January:
30.01"Hg - Average pressure in February:
29.99"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
30"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.94"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.04"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
Nashua, NH
- Average wind speed in January:
8.1mph - Average wind speed in February:
8mph - Average wind speed in March:
7.8mph - Average wind speed in April:
7.6mph - Average wind speed in May:
6.3mph - Average wind speed in June:
5.8mph
- Average wind speed in July:
5.2mph - Average wind speed in August:
5.1mph - Average wind speed in September:
5.5mph - Average wind speed in October:
6.5mph - Average wind speed in November:
7mph - Average wind speed in December:
7.6mph
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
Nashua, NH
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (71%).
Average rainfall
Nashua, NH
- Average rainfall in January:
0.55" - Average rainfall in February:
0.47" - Average rainfall in March:
0.59" - Average rainfall in April:
0.63" - Average rainfall in May:
0.63" - Average rainfall in June:
0.71"
- Average rainfall in July:
0.71" - Average rainfall in August:
0.55" - Average rainfall in September:
0.28" - Average rainfall in October:
0.71" - Average rainfall in November:
0.79" - Average rainfall in December:
0.63"
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
Nashua, NH
- Average rainfall days in January:
3.5 days - Average rainfall days in February:
3.8 days - Average rainfall days in March:
8.3 days - Average rainfall days in April:
9.5 days - Average rainfall days in May:
9.4 days - Average rainfall days in June:
10.4 days
- Average rainfall days in July:
10.3 days - Average rainfall days in August:
9.4 days - Average rainfall days in September:
7 days - Average rainfall days in October:
7.8 days - Average rainfall days in November:
5.7 days - Average rainfall days in December:
6.1 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
Nashua, NH
- Average snowfall in January:
1.1" - Average snowfall in February:
1.26" - Average snowfall in March:
0.98" - Average snowfall in April:
0.59" - Average snowfall in May:
0.04" - Average snowfall in June:
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
Nashua, NH
- Average snowfall days in January:
6.5 days - Average snowfall days in February:
6.7 days - Average snowfall days in March:
4.8 days - Average snowfall days in April:
1.2 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.4 days - Average snowfall days in November:
1.5 days - Average snowfall days in December:
3.8 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 / Average sunshine
Nashua, NH
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 42min - Average daylight in June:
15h and 18min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 6min
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 January:
5h and 6min - Average sunshine in February:
4h and 36min - Average sunshine in March:
5h and 48min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 30min - Average sunshine in June:
9h and 0min
- Average sunshine in July:
10h and 12min - Average sunshine in August:
10h and 24min - Average sunshine in September:
8h and 24min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 54min
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
Nashua, NH
- Average sunshine days in January:
22.6 days - Average sunshine days in February:
18.8 days - Average sunshine days in March:
19.4 days - Average sunshine days in April:
19.2 days - Average sunshine days in May:
18.5 days - Average sunshine days in June:
17.4 days
- Average sunshine days in July:
17.3 days - Average sunshine days in August:
18.7 days - Average sunshine days in September:
21.6 days - Average sunshine days in October:
20.3 days - Average sunshine days in November:
22.5 days - Average sunshine days in December:
21.8 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
Nashua, NH
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
Nashua, NH
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
Nashua, NH
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).
