Updated October 2026
Lowell National Historical Park Weather by Month
Lowell National Historical Park is warmest in July, when the nearest NOAA climate station averages a high of 85°F and a low of 61°F, and coldest in January, with an average high of 34°F and an average low of 16°F. October is the wettest month, with about 5 inches of precipitation.
These figures are NOAA's 1991–2020 climate normals, the 30-year average for each calendar month, from the nearest long-record weather station, 2.4 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Lowell National Historical Park can differ from these, particularly with elevation.
Warmest month
Jul
85°F avg high
Coldest month
Jan
16°F avg low
Wettest month
Oct
5.0 in avg
Longest days
Jun
15.1 h of daylight
Average weather at Lowell by month
| Month | Avg high | Avg low | Precipitation | Daylight |
|---|---|---|---|---|
| January | 34°F | 16°F | 3.6 in | 9.2 h |
| February | 37°F | 17°F | 3.2 in | 10.3 h |
| March | 45°F | 24°F | 4.3 in | 11.7 h |
| April | 59°F | 35°F | 4.1 in | 13.2 h |
| May | 70°F | 45°F | 3.8 in | 14.4 h |
| June | 79°F | 55°F | 4.4 in | 15.1 h |
| July | 85°F | 61°F | 3.9 in | 14.8 h |
| August | 83°F | 59°F | 4.0 in | 13.7 h |
| September | 76°F | 52°F | 3.9 in | 12.3 h |
| October | 62°F | 40°F | 5.0 in | 10.8 h |
| November | 51°F | 30°F | 3.9 in | 9.5 h |
| December | 40°F | 22°F | 4.5 in | 8.9 h |
| Year total | 48.6 in |
NOAA 1991–2020 climate normals from station USC00194313, 2.4 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Lowell is at that time of year.
Lowell weather by season
Winter: December to February
Average highs bottom out at 34°F in January, between 40°F in December and 37°F in February, with average lows between 16°F and 22°F. The average low is at or below freezing in all three months. Together the three months average 11.3 inches of precipitation, about 23% of the yearly total and less than in any other season. Daylight is at its shortest, about 8.9 hours in December.
Spring: March to May
Average highs climb from 45°F in March to 70°F in May, with average lows between 24°F and 45°F. The average low is at or below freezing in March. Together the three months average 12.2 inches of precipitation, about 25% of the yearly total. Daylight lengthens from about 11.7 hours in March to 14.4 in May.
Summer: June to August
Average highs peak at 85°F in July, between 79°F in June and 83°F in August, with average lows between 55°F and 61°F. Together the three months average 12.3 inches of precipitation, about 25% of the yearly total. Daylight is at its longest, about 15.1 hours in June.
Fall: September to November
Average highs fall from 76°F in September to 51°F in November, with average lows between 30°F and 52°F. The average low is at or below freezing in November. Together the three months average 12.8 inches of precipitation, about 26% of the yearly total and more than in any other season. Daylight shortens from about 12.3 hours in September to 9.5 in November.
What the National Park Service says about the weather
Summer: Throughout the summer, temperatures range from the mid 60s to mid 90s during the day, with rain and thunderstorms more common in the months of July and August. Boats and trolleys operate rain or shine and are only cancelled in cases of extreme weather or the presence of thunder and lightning. Winter: Winters are typically cold with temperatures in the mid 30s and 40s (with occasional single digit temperatures) and snow storms with a few inches accumulation occur frequently throughout the season.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Lowell
Averages describe a typical month, not this week. For current conditions and the seven-day outlook, the National Weather Service issues a forecast for the park's reference point at 42.65°N, 71.32°W. It covers that one spot, so other elevations in the park can differ from it, as they do from the averages above.
National Weather Service forecast for Lowell National Historical Park →
Weather and crowds together
July is both the warmest month and the busiest, with about 4.8× the visitors of the park's average month. December is the quietest. To see those crowds set against the weather for all twelve months, read the best time to visit Lowell National Historical Park. For hotels, cabins and rentals close to the park, see where to stay near Lowell.
Where to stay near Lowell
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Top-rated places to stay near Lowell
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Frequently Asked Questions
July is the warmest month at Lowell National Historical Park, with an average high of 85°F and an average low of 61°F. That is the 1991–2020 average at the nearest long-record NOAA station, 2.4 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
January is the coldest month at Lowell National Historical Park, with an average low of 16°F and an average high of 34°F, based on NOAA 1991–2020 climate normals.
October is the wettest month, with about 5 inches of precipitation. February is the driest, at about 3.2 inches. The station records about 48.6 inches of precipitation in an average year.
Daylight at Lowell National Historical Park runs from about 8.9 hours a day in December to about 15.1 hours in June, computed from the park's latitude.
Weather at nearby parks
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Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USC00194313), daylight computed from latitude, weather description from the National Park Service, crowd levels from National Park Service Visitor Use Statistics (1979–2025). Updated 2026-10-11. Lodging results are provided by Stay22; WhenToVisitParks may earn a commission from bookings, at no extra cost to you.