Tully Lake, Massachusetts climate: Climate normals at a NOAA weather station
Tully Lake's normal year runs from 14°F January nights to 85°F July afternoons, with 47.5 inches of precipitation and 52 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.5°C, January lows of −10°C, July highs of 30°C, 1,205 mm of precipitation a year.
- NOAA stationTully Lake
- Station IDUSC00198573
- Location42.64°N 72.22°W
- Elevation680 ft (207 m)
On October 23, the normal high in Tully Lake is 59°F and the normal low 38°F, and the chance of measurable rain or snow is 36%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Tully Lake.
- Jan 33° 14°
- Feb 37° 15°
- Mar 45° 24°
- Apr 59° 36°
- May 71° 47°
- Jun 80° 57°
- Jul 85° 62°
- Aug 83° 60°
- Sep 75° 52°
- Oct 62° 41°
- Nov 49° 31°
- Dec 38° 22°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Tully Lake each month?
July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 14°F. The most precipitation falls in October (4.68 in), the least in February (2.94 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 33°F | 14°F | 23.6°F | 3.56 | 14.3 | 11 | <1 | 29 | 9 h 20 min |
| February | 37°F | 15°F | 25.8°F | 2.94 | 12.5 | 10 | <1 | 27 | 10 h 30 min |
| March | 45°F | 24°F | 34.2°F | 3.90 | 9.4 | 10 | <1 | 28 | 11 h 50 min |
| April | 59°F | 36°F | 47.2°F | 3.55 | 3.0 | 12 | <1 | 16 | 13 h 20 min |
| May | 71°F | 47°F | 59.2°F | 3.51 | 0.0 | 13 | 1 | 2 | 14 h 40 min |
| June | 80°F | 57°F | 68.3°F | 4.47 | 0.0 | 13 | 4 | <1 | 15 h 20 min |
| July | 85°F | 62°F | 73.8°F | 4.59 | 0.0 | 11 | 7 | <1 | 15 h |
| August | 83°F | 60°F | 71.8°F | 4.27 | 0.0 | 11 | 5 | <1 | 14 h |
| September | 75°F | 52°F | 63.8°F | 4.34 | 0.0 | 10 | 1 | <1 | 12 h 30 min |
| October | 62°F | 41°F | 51.2°F | 4.68 | 0.0 | 11 | <1 | 9 | 11 h 10 min |
| November | 49°F | 31°F | 40.2°F | 3.59 | 1.2 | 10 | <1 | 21 | 9 h 50 min |
| December | 38°F | 22°F | 29.9°F | 4.05 | 11.8 | 11 | <1 | 28 | 9 h |
| Year (annual) | 60°F | 38°F | 49.1°F | 47.45 | 52.2 | 133 | 18 | 159 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 1°C | −10°C | −4.7°C | 90 mm | 36 cm |
| February | 3°C | −9°C | −3.4°C | 75 mm | 32 cm |
| March | 7°C | −5°C | 1.2°C | 99 mm | 24 cm |
| April | 15°C | 2°C | 8.4°C | 90 mm | 8 cm |
| May | 22°C | 8°C | 15.1°C | 89 mm | 0 cm |
| June | 26°C | 14°C | 20.2°C | 114 mm | 0 cm |
| July | 30°C | 17°C | 23.2°C | 117 mm | 0 cm |
| August | 29°C | 16°C | 22.1°C | 108 mm | 0 cm |
| September | 24°C | 11°C | 17.7°C | 110 mm | 0 cm |
| October | 17°C | 5°C | 10.7°C | 119 mm | 0 cm |
| November | 9°C | 0°C | 4.6°C | 91 mm | 3 cm |
| December | 3°C | −6°C | −1.2°C | 103 mm | 30 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00198573; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at Tully Lake?
Normal highs sit between 65°F and 85°F in May, June, August and September. Of those, September has the fewest days with rain (10).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00198573.
When is the last frost at Tully Lake?
In Tully Lake, the last spring frost (32°F) comes after April 25 in half of years and after May 8 in one year in ten; the first autumn frost comes before October 17 in half of years and before October 3 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 251 year in 10 after May 8; 9 in 10 after April 13
- First autumn frost, half of years before
- October 171 year in 10 before October 3; 9 in 10 before November 2
NOAA puts the median frost-free season at 175 days, and the season without a hard freeze (28°F) at 202 days.
A hard freeze (28°F) comes after April 12 in half of springs and before October 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Tully Lake in zone 5b in ZIP code 01368, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 5b: the coldest night of a typical year reaches −13°F (18 complete years).
Frost dates for every NOAA station in Massachusetts · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00198573; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at Tully Lake?
In a normal year in Tully Lake, 18 days a year reach 90°F, 159 nights fall to 32°F or colder and 133 days bring measurable precipitation.
- Days at 90°F or more
- 18a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 159a normal year
- Days that stay below freezing
- 37high of 32°F or less
- Days with 0.01 inch of precipitation
- 133a normal year
- Days with 1 inch of snow or more
- 16a normal year
The highest temperature in this station's record (since 1949) is 100°F, on July 4, 1966; the lowest is −29°F, on January 18, 1957.
The wettest calendar year on that record is 2018, with 69.00 in; the snowiest season is 1995–96, with 114.3 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00198573; records: ACIS (NOAA Regional Climate Centers), station USC00198573. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Tully Lake?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds at Tully Lake, 3.8 kWh per square metre a day. August is the sunniest month (77%) and December the cloudiest (62%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 66% | 1.8 |
| February | 67% | 2.6 |
| March | 68% | 3.7 |
| April | 68% | 4.7 |
| May | 68% | 5.3 |
| June | 71% | 5.7 |
| July | 77% | 6.0 |
| August | 77% | 5.3 |
| September | 76% | 4.3 |
| October | 67% | 2.7 |
| November | 68% | 1.9 |
| December | 62% | 1.4 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does Tully Lake record?
A normal year at Tully Lake brings 6,529 heating degree days, 22% more than the median U.S. place (5,373), and 766 cooling degree days, 16% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,887 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,285 | 0 |
| February | 1,098 | 0 |
| March | 956 | 0 |
| April | 536 | 4 |
| May | 218 | 38 |
| June | 44 | 144 |
| July | 4 | 275 |
| August | 11 | 222 |
| September | 115 | 78 |
| October | 432 | 6 |
| November | 744 | 0 |
| December | 1,087 | 0 |
| Year (annual) | 6,529 | 766 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00198573. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Have recent years at Tully Lake been warmer than normal?
2025 averaged 47.3°F, 1.8°F below the 1991-2020 normal of 49.1°F. 1 of the 2 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 51.2°F | +2.1°F | 53.16 | – |
| 2025 | 47.3°F | −1.8°F | – | – |
Over 53 complete years from 1951 to 2025, the station's annual mean temperature rose at a fitted 3.1°F per century (+0.17°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00198573; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Tully Lake's climate compare?
Tully Lake is warmer than 14 of the 35 places with their own NOAA record in Massachusetts, and wetter than 15. Across the 7,247 U.S. stations with normals, its annual mean of 49.1°F is warmer than 36%.
In the Köppen classification computed from these normals, Tully Lake is Dfa: continental, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Tully Lake share this climate record?
3 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Athol, MA12,105 people · 3 mi S
- Winchester, NH4,255 people · 13 mi NW
- Troy, NH2,198 people · 13 mi N
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Tully Lake's climate
What is the coldest month at Tully Lake?
January, with a normal high of 33°F and a normal low of 14°F. The warmest is July (85°F by day, 62°F at night).
Does it snow at Tully Lake?
Yes: 52 inches in a normal year, falling on 22 days with 0.1 inch or more, the most in January (14.3 inches).
What is the rainiest month at Tully Lake?
October, with 4.68 in of precipitation in a normal year; the driest is February with 2.94 in.
What plant hardiness zone is Tully Lake in?
The USDA's 2023 map puts Tully Lake in zone 5b in ZIP code 01368, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −13°F (18 years, 1991-2020): zone 5b.
How late can frost come at Tully Lake?
In half of years the last 32°F night comes after April 25; in one year in ten it comes after May 8. Waiting until May 8 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Massachusetts climateThe statewide normals and every place in the state
- Birch Hill Dam, MA5 miles from this station, 46.3°F a year
- Orange, MA6 miles from this station, 48.3°F a year
- Ashburnham N, MA15 miles from this station, 45.4°F a year
- Ashburnham, MA16 miles from this station, 46.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made