Updated October 2026
Sleeping Giant State Park: Weather by Month and When to Go
Sleeping Giant State Park is a state park in Connecticut. Average highs range from 38°F in January to 85°F in July.
Average highs sit between 60°F and 80°F in April through June and September through October. They run above 80°F in July and August and below 60°F in November through March. The figures are NOAA climate normals for 1991–2020, measured at a weather station 2.6 miles from the park.
Warmest average high
85°F
July
Coldest average low
20°F
January
Most precipitation
4.9 in
June and October
Longest days
15.0 h
June
Sleeping Giant State Park weather by month
| Month | Average high | Average low | Precipitation | Daylight |
|---|---|---|---|---|
| January | 38°F | 20°F | 3.6 in | 9.3 h |
| February | 41°F | 22°F | 3.5 in | 10.4 h |
| March | 48°F | 28°F | 4.4 in | 11.7 h |
| April | 61°F | 38°F | 4.7 in | 13.1 h |
| May | 71°F | 48°F | 3.7 in | 14.3 h |
| June | 79°F | 58°F | 4.9 in | 15.0 h |
| July | 85°F | 64°F | 3.8 in | 14.7 h |
| August | 84°F | 62°F | 3.8 in | 13.7 h |
| September | 76°F | 55°F | 4.3 in | 12.3 h |
| October | 64°F | 43°F | 4.9 in | 10.8 h |
| November | 53°F | 34°F | 4.4 in | 9.6 h |
| December | 42°F | 27°F | 4.5 in | 9.0 h |
Temperature and precipitation figures are NOAA climate normals for 1991–2020 from station USC00065077, the nearest station with a complete set of temperature normals, 2.6 miles from the park. Conditions in the park can differ from the station's, most of all where the two sit at different elevations. Daylight is calculated for the park's latitude at the middle of each month.
What the averages show
- Temperature. July is the warmest month, with an average high of 85°F and an average low of 64°F. January is the coldest month, with an average low of 20°F and an average high of 38°F.
- Precipitation. June and October are the wettest months, each averaging 4.9 inches of precipitation, and February is the driest, at 3.5 inches. An average year brings about 50.5 inches in total.
- Snowfall. The station has no snowfall normal, so snowfall is left out of the table. That is a gap in the station's record, not a sign that it never snows here.
- Daylight. Days run from about 9.0 hours of daylight in December to 15.0 hours in June.
Camping, trails, maps and fees
Whether Sleeping Giant State Park has camping or cabins, where its trails run, when it opens and what it charges are all published by the agency that runs the park. Its official page is the place to check before a trip.
Official Sleeping Giant State Park page
For the forecast rather than the averages, the National Weather Service issues a point forecast for the park's location.
National Weather Service forecast for Sleeping Giant State Park
Where to stay near Sleeping Giant State Park
Hotels, cabins and vacation rentals near Sleeping Giant State Park, with live availability and prices.
Top-rated places to stay near Sleeping Giant State Park
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Frequently Asked Questions
July is the warmest month, with an average high of 85°F and an average low of 64°F. January is the coldest month, with an average low of 20°F and an average high of 38°F. These are NOAA 1991–2020 climate normals from a weather station 2.6 miles from the park.
Average highs sit between 60°F and 80°F in April through June and September through October. They run above 80°F in July and August and below 60°F in November through March.
June and October are the wettest months, each averaging 4.9 inches of precipitation, and February is the driest, at 3.5 inches. An average year brings about 50.5 inches in total. The station has no snowfall normal, so no snowfall figure is available.
Days run from about 9.0 hours of daylight in December to 15.0 hours in June. The hours are calculated for the park's latitude.
Nearest National Park Service sites
- Weir Farm National Historical Park32 miles away
- Springfield Armory National Historic Site49 miles away
- Sagamore Hill National Historic Site50 miles away
Nearby state parks
- Wadsworth Falls State Park12 miles away
- Dinosaur State Park19 miles away
- Hammonasset Beach State Park21 miles away
- Gillette Castle State Park24 miles away
Distances are measured in a straight line from the park, so the drive is longer.
Sources: NOAA NCEI U.S. Climate Normals 1991–2020; USGS Protected Areas Database for location; the official Connecticut state park listing for the park's name.