August weather forecast
Connecticut, USA

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Flag of Connecticut, USA

Weather in August

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.

  • Hartford - August »
    In Hartford, during August, the rain falls for 11.4 days and regularly aggregates up to 0.79" (20mm) of precipitation. July and August, with an average of 10.4h of sunshine, are months with the most sunshine in Hartford.
  • New Haven - August »
    The month with the warmest seawater in New Haven is August, with an average ocean temperature of 73°F (22.8°C). June through August, with an average maximum UV index of 6, are months with the highest UV index in New Haven, Connecticut.
  • Stamford - August »
    The month with the warmest seawater in Stamford is August, with an average ocean temperature of 73°F (22.8°C). June through August, with an average maximum UV index of 6, are months with the highest UV index in Stamford, Connecticut.
  • Bridgeport - August »
    The month with the warmest seawater in Bridgeport, Connecticut, is August, with an average ocean temperature of 73°F (22.8°C). In Bridgeport the average seawater temperature in August is 73°F (22.8°C).
  • Waterbury - August »
    The months with the highest UV index in Waterbury are June through August, with an average maximum UV index of 6. The months with the most sunshine in Waterbury are July and August, with an average of 10.1h of sunshine.
  • Norwalk - August »
    August is the month with the warmest seawater in Norwalk with an average ocean temperature of 73°F (22.8°C). In Norwalk, during August, the rain falls for 16.8 days and regularly aggregates up to 3.54" (90mm) of precipitation.
  • Danbury - August »
    The months with the most sunshine in Danbury are July and August, with an average of 10.2h of sunshine. July and August, with an average of 10.2h of sunshine, are months with the most sunshine in Danbury.
  • New Britain - August »
    In New Britain during August, the rain falls for 17 days and regularly aggregates up to 2.72" (69mm) of precipitation. 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, Connecticut. In Bristol in August, during 17.5 rainfall days, 3.03" (77mm) of precipitation is typically accumulated.
  • Meriden - August »
    In Meriden in August, during 16.6 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. June through August, with an average maximum UV index of 6, are months with the highest UV index in Meriden, Connecticut.
  • Milford - August »
    August is the month with the warmest seawater in Milford, with an average ocean temperature of 73°F (22.8°C). In Milford during August, the rain falls for 17.3 days and regularly aggregates up to 3.23" (82mm) of precipitation.
  • West Haven - August »
    In August, in West Haven the rain falls for 17.1 days. The months with the highest UV index in West Haven, Connecticut, are June through August, with an average maximum UV index of 6.
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Connecticut, USA

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