Farmington, Maine climate: Normal weather by month, frost dates and records
Farmington's normal year runs from 6°F January nights to 79°F July afternoons, with 49.5 inches of precipitation and 94 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.0°C, January lows of −15°C, July highs of 26°C, 1,256 mm of precipitation a year.
- NOAA stationFarmington
- Station IDUSC00172765
- Location44.69°N 70.16°W
- Elevation405 ft (123 m)
- From the center2 miles
- Population (town)8,320
- Census place4,879
On October 23, the normal high in Farmington is 54°F and the normal low 33°F, and the chance of measurable rain or snow is 39%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Farmington.
- Jan 27° 6°
- Feb 30° 7°
- Mar 39° 18°
- Apr 52° 30°
- May 65° 41°
- Jun 74° 50°
- Jul 79° 56°
- Aug 77° 54°
- Sep 70° 45°
- Oct 57° 35°
- Nov 44° 26°
- Dec 33° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Farmington each month?
July is the warmest month, with normal highs of 79°F; January the coldest, with normal lows of 6°F. The most precipitation falls in October (5.21 in), the least in February (3.15 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 27°F | 6°F | 16.2°F | 3.53 | 20.7 | 11 | <1 | 31 | 9 h 10 min |
| February | 30°F | 7°F | 18.4°F | 3.15 | 22.9 | 9 | <1 | 28 | 10 h 20 min |
| March | 39°F | 18°F | 28.4°F | 3.99 | 18.8 | 11 | <1 | 29 | 11 h 50 min |
| April | 52°F | 30°F | 41.1°F | 4.34 | 5.3 | 11 | <1 | 20 | 13 h 30 min |
| May | 65°F | 41°F | 53.0°F | 3.87 | 0.2 | 13 | <1 | 5 | 14 h 50 min |
| June | 74°F | 50°F | 62.0°F | 5.09 | 0.0 | 13 | 1 | <1 | 15 h 30 min |
| July | 79°F | 56°F | 67.0°F | 3.96 | 0.0 | 13 | 1 | <1 | 15 h 20 min |
| August | 77°F | 54°F | 65.4°F | 4.05 | 0.0 | 12 | 1 | <1 | 14 h 10 min |
| September | 70°F | 45°F | 57.7°F | 3.51 | 0.0 | 10 | <1 | 3 | 12 h 40 min |
| October | 57°F | 35°F | 46.0°F | 5.21 | 0.3 | 12 | <1 | 13 | 11 h |
| November | 44°F | 26°F | 34.8°F | 4.44 | 4.9 | 12 | <1 | 24 | 9 h 40 min |
| December | 33°F | 15°F | 23.8°F | 4.31 | 20.8 | 13 | <1 | 30 | 8 h 50 min |
| Year (annual) | 54°F | 32°F | 42.8°F | 49.45 | 93.9 | 139 | 3 | 183 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −3°C | −15°C | −8.8°C | 90 mm | 53 cm |
| February | −1°C | −14°C | −7.6°C | 80 mm | 58 cm |
| March | 4°C | −8°C | −2.0°C | 101 mm | 48 cm |
| April | 11°C | −1°C | 5.1°C | 110 mm | 13 cm |
| May | 19°C | 5°C | 11.7°C | 98 mm | 1 cm |
| June | 23°C | 10°C | 16.7°C | 129 mm | 0 cm |
| July | 26°C | 13°C | 19.4°C | 101 mm | 0 cm |
| August | 25°C | 12°C | 18.6°C | 103 mm | 0 cm |
| September | 21°C | 7°C | 14.3°C | 89 mm | 0 cm |
| October | 14°C | 2°C | 7.8°C | 132 mm | 1 cm |
| November | 7°C | −4°C | 1.6°C | 113 mm | 12 cm |
| December | 0°C | −10°C | −4.6°C | 109 mm | 53 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00172765; 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.
When is the best weather to visit Farmington?
Normal highs sit between 65°F and 85°F in May, June, July, 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 USC00172765.
When is the last frost in Farmington?
In Farmington, the last spring frost (32°F) comes after May 16 in half of years and after June 1 in one year in ten; the first autumn frost comes before September 26 in half of years and before September 14 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
- May 161 year in 10 after June 1; 9 in 10 after May 3
- First autumn frost, half of years before
- September 261 year in 10 before September 14; 9 in 10 before October 9
NOAA puts the median frost-free season at 130 days, and the season without a hard freeze (28°F) at 155 days.
A hard freeze (28°F) comes after May 3 in half of springs and before October 5 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Farmington in zone 5a in ZIP code 04992, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Farmington's NOAA station is in zone 5a: the coldest night of a typical year reaches −20°F (30 complete years).
Frost dates for every NOAA station in Maine · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00172765; 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 in Farmington?
In a normal year in Farmington, 3 days a year reach 90°F, 183 nights fall to 32°F or colder and 139 days bring measurable precipitation.
- Days at 90°F or more
- 3a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 183a normal year
- Days that stay below freezing
- 63high of 32°F or less
- Days with 0.01 inch of precipitation
- 139a normal year
- Days with 1 inch of snow or more
- 23a normal year
The highest temperature in this station's record (since 1893) is 104°F, on July 10, 1911; the lowest is −39°F, on January 20, 1994.
The wettest calendar year on that record is 2005, with 67.78 in; the snowiest season is 1968–69, with 164.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00172765; records: ACIS (NOAA Regional Climate Centers), station USC00172765. Records use complete months only; a month missing more than three days is left out.
How sunny is Farmington?
Over a year 69% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Farmington, 3.6 kWh per square metre a day. September is the sunniest month (76%) and December the cloudiest (60%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 64% | 1.6 |
| February | 67% | 2.5 |
| March | 69% | 3.6 |
| April | 67% | 4.6 |
| May | 66% | 5.2 |
| June | 68% | 5.6 |
| July | 74% | 5.7 |
| August | 76% | 5.2 |
| September | 76% | 4.2 |
| October | 66% | 2.6 |
| November | 64% | 1.7 |
| December | 60% | 1.2 |
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 much heating and cooling does Farmington need?
A normal year in Farmington brings 8,288 heating degree days, 54% more than the median U.S. place (5,373), and 245 cooling degree days, 73% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,832 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,513 | 0 |
| February | 1,303 | 0 |
| March | 1,135 | 0 |
| April | 716 | 0 |
| May | 377 | 7 |
| June | 132 | 42 |
| July | 39 | 102 |
| August | 59 | 73 |
| September | 241 | 20 |
| October | 591 | 1 |
| November | 906 | 0 |
| December | 1,277 | 0 |
| Year (annual) | 8,288 | 245 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00172765. 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.
Has Farmington been warmer than normal lately?
2024 averaged 46.0°F, 3.2°F above the 1991-2020 normal of 42.8°F. 2 of the 2 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 45.4°F | +2.6°F | 38.22 | 65.5 |
| 2024 | 46.0°F | +3.2°F | 52.49 | 99.9 |
Over 109 complete years from 1893 to 2024, the station's annual mean temperature rose at a fitted 4.3°F per century (+0.24°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00172765; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Farmington's climate compare?
Farmington is warmer than 12 of the other 41 places with their own NOAA record in Maine, and wetter than 32. Across the 7,247 U.S. stations with normals, its annual mean of 42.8°F is warmer than 12%.
In the Köppen classification computed from these normals, Farmington is Dfb: continental, no dry season, warm 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 Farmington share this climate record?
Wilton has no NOAA station with 1991-2020 normals of its 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.
- Wilton, ME3,889 people · 8 mi SW
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 Farmington's climate
What is the coldest month in Farmington?
January, with a normal high of 27°F and a normal low of 6°F. The warmest is July (79°F by day, 56°F at night).
Does it snow in Farmington?
Yes: 94 inches in a normal year, falling on 33 days with 0.1 inch or more, the most in February (22.9 inches).
What is the rainiest month in Farmington?
October, with 5.21 in of precipitation in a normal year; the driest is February with 3.15 in.
What plant hardiness zone is Farmington in?
The USDA's 2023 map puts Farmington in zone 5a in ZIP code 04992, the nearest ZIP area. By the same method at Farmington's NOAA station, the coldest night of a typical year reaches −20°F (30 years, 1991-2020): zone 5a.
How late can frost come in Farmington?
In half of years the last 32°F night comes after May 16; in one year in ten it comes after June 1. Waiting until June 1 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Maine climateThe statewide normals and every place in the state
- New Sharon, ME9 miles from this station, 43.4°F a year
- Livermore Falls, ME15 miles from this station, 43.2°F a year
- Madison, ME15 miles from this station, 43.1°F a year
- Rumford, ME22 miles from this station, 44.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made