August weather forecast
Connecticut, USA

August continues the summer trend in Connecticut, maintaining hot and humid conditions, but it often begins to signal a gradual transition toward the milder weather of fall. The influence of the Bermuda High persists, though it may start to wane toward the end of the month.

Average high temperatures remain around 85°F (29.4°C), though occasional heatwaves can still push temperatures higher. Coastal areas might offer slightly more moderate weather, reflecting the influence of water bodies in the south.

Thunderstorms continue to be frequent, particularly in the late afternoons, contributing to the state's annual rainfall of 44" (1118mm) to 48" (1219mm). These storms are often accompanied by lightning and thunder, similar to the patterns observed in June and July.

Humidity remains high but might begin to decrease slightly as the month progresses. This reduction in humidity, while subtle, is often a welcome relief after the peak levels experienced in July.

Sunshine is abundant, maintaining the pattern of 100 to 125 clear days in the year, with the percentage of possible annual sunshine ranging from 45% to 65%. The sunniest period of June to August concludes with August, often offering clear and bright days.

August's weather in Connecticut is still firmly within the summer season, with hot and humid conditions prevailing. However, the month may begin to show signs of a transition, particularly in the reduction of humidity and the potential for slightly cooler temperatures toward the end of the month. The weather remains consistent with July but often starts to signal the impending arrival of fall. The progression from the intense heat of July to the subtly moderated conditions of August represents a gradual shift, maintaining the summer's characteristics while hinting at the changes to come.

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• Hartford - August »
  The months with the most sunshine are July and August, with an average of 10.4h of sunshine. The months with the highest UV index are June through August, with an average maximum UV index of 6.
• New Haven - August »
  August is the month with the warmest seawater in New Haven, with an average ocean temperature of 73°F (22.8°C). With an average ocean temperature of 73°F (22.8°C), August is the month with the warmest seawater in New Haven.
• Stamford - August »
  April, August and November, with an average relative humidity of 72%, are the least humid months in Stamford. The months with the highest UV index in Stamford are June through August, with an average maximum UV index of 6.
• Bridgeport - August »
  The advent of August in Bridgeport reveals an average high-temperature of a still warm 80.1°F (26.7°C), showing minimal difference from the prior month. In Bridgeport, Connecticut, during August, the rain falls for 17 days and regularly aggregates up to 3.35" (85mm) of precipitation.
• Waterbury - August »
  June through August, with an average maximum UV index of 6, are months with the highest UV index in Waterbury, Connecticut. July and August, with an average of 10.1h of sunshine, are months with the most sunshine in Waterbury.
• Norwalk - August »
  With an average ocean temperature of 73°F (22.8°C), August is the month with the warmest seawater in Norwalk. In Norwalk, Connecticut, in August, during 16.8 rainfall days, 3.54" (90mm) of precipitation is typically accumulated.
• Danbury - August »
  In Danbury, Connecticut, during August, the rain falls for 12.8 days and regularly aggregates up to 1.14" (29mm) of precipitation. On the first day of August in Danbury, Connecticut, sunrise is at 5:49 am and sunset at 8:10 pm.
• New Britain - August »
  On the first day of August in New Britain, Connecticut, sunrise is at 5:46 am and sunset at 8:08 pm. The months with the highest UV index in New Britain are June through August, with an average maximum UV index of 6.
• Bristol - August »
  July and August, with an average of 10.2h of sunshine, are months with the most sunshine in Bristol. July and August, with an average of 10.2h of sunshine, are months with the most sunshine in Bristol.
• Meriden - August »
  In Meriden, during August, the rain falls for 16.6 days and regularly aggregates up to 2.72" (69mm) of precipitation. In August, in Meriden the rain falls for 16.6 days.
• Milford - August »
  With an average ocean temperature of 73°F (22.8°C), August is the month with the warmest seawater in Milford, Connecticut. In Milford in August, the average water temperature is 73°F (22.8°C).
• West Haven - August »
  June through August, with an average maximum UV index of 6, are months with the highest UV index in West Haven, Connecticut. On the first day of August in West Haven, sunrise is at 5:47 am and sunset at 8:08 pm.