August weather forecast
New Hampshire, USA

August continues the summer season in New Hampshire, with temperatures slightly cooler than July but still firmly within the warm range. Average lows during this month are from 55°F (12.8°C) to 61°F (16.1°C), and average highs are between 76°F (24.4°C) to 84°F (28.9°C). Though a decrease from July, these temperatures maintain the summer warmth that characterizes the state during this period.

Rainfall remains moderate, and the potential for thunderstorms continues, particularly in the afternoon. The coastal influence of the Atlantic Ocean is still present in the southeastern region, while the northern mountain ranges do not significantly impact the weather in August.

Recreational activities remain popular, with the state's varied landscapes offering opportunities for hiking, swimming, and exploring. Beaches continue to attract visitors, and the trails of the White Mountains are busy with hikers.

August marks a transition towards the end of summer, with the temperatures gradually cooling as the month progresses. This subtle shift can be observed in the decreasing daylight hours and the early signs of fall in some of the state's vegetation.

Compared to July, August in New Hampshire maintains the summer weather but with a hint of the coming change in seasons. It represents the last full month of summer, with temperatures still suitable for outdoor activities and tourism, yet beginning to hint at the cooler and more varied weather of the approaching autumn.

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• Manchester - August »
  June through August, with an average maximum UV index of 6, are months with the highest UV index in Manchester, New Hampshire. The month with the most sunshine in Manchester is August, with an average of 10.4h of sunshine.
• Nashua - August »
  On the first day of August in Nashua sunrise is at 5:37 am and sunset at 8:07 pm. July's transformation into August witnesses an average high-temperature of a still moderately hot 80.2°F (26.8°C) in Nashua, noting a minor change from the preceding month.
• Concord - August »
  The month with the most sunshine is August, with an average of 10.3h of sunshine. On the first day of August in Concord sunrise is at 5:36 am and sunset at 8:08 pm.
• Derry - August »
  In Derry in August, during 10.4 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. In Derry, in August, during 10.4 rainfall days, 1.1" (28mm) of precipitation is typically accumulated.
• Dover - August »
  August in Dover mimics July's conditions closely, with near-peak temperatures and the least cloudiness, marked by 29% of cloud coverage. In Dover, in August, during 13.1 rainfall days, 2.01" (51mm) of precipitation is typically accumulated.
• Rochester - August »
  In Rochester during August, the rain falls for 13.7 days and regularly aggregates up to 2.01" (51mm) of precipitation. The months with the highest UV index in Rochester, New Hampshire, are July and August, with an average maximum UV index of 6.
• Salem - August »
  In Salem, in August, the average water temperature is 66.4°F (19.1°C). On the first day of August in Salem, sunrise is at 5:36 am and sunset at 8:06 pm.
• Merrimack - August »
  In Merrimack during August, the rain falls for 10.4 days and regularly aggregates up to 1.1" (28mm) of precipitation. Merrimack indicates an average high-temperature of a still moderately hot 80.1°F (26.7°C) in August, showing minor variation from July's 81.7°F (27.6°C).
• Londonderry - August »
  On the first day of August in Londonderry sunrise is at 5:36 am and sunset at 8:06 pm. The months with the highest UV index in Londonderry are June through August, with an average maximum UV index of 6.
• Keene - August »
  Despite being deep into summer, August in Keene exhibits a slight dampening in temperature as the profound heat of July gives way to relatively mild conditions. On the first day of August in Keene, sunrise is at 5:40 am and sunset at 8:10 pm.
• Bedford - August »
  The month with the most sunshine in Bedford is August, with an average of 10.4h of sunshine. The months with the highest UV index in Bedford, New Hampshire, are June through August, with an average maximum UV index of 6.