East Hiram, Maine climate: Climate normals at a NOAA weather station
East Hiram's normal year runs from 6°F January nights to 79°F July afternoons, with 49.7 inches of precipitation and 78 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.3°C, January lows of −14°C, July highs of 26°C, 1,262 mm of precipitation a year.
- NOAA stationEast Hiram
- Station IDUSC00172238
- Location43.88°N 70.75°W
- Elevation528 ft (161 m)
On October 23, the normal high in East Hiram is 55°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 East Hiram.
- Jan 29° 6°
- Feb 32° 7°
- Mar 40° 18°
- Apr 54° 30°
- May 66° 41°
- Jun 74° 51°
- Jul 79° 56°
- Aug 78° 54°
- Sep 70° 46°
- Oct 57° 35°
- Nov 45° 26°
- Dec 34° 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 at East Hiram 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 (5.36 in), the least in January (3.29 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 29°F | 6°F | 17.5°F | 3.29 | 19.2 | 11 | <1 | 31 | 9 h 10 min |
| February | 32°F | 7°F | 19.6°F | 3.29 | 17.4 | 8 | <1 | 28 | 10 h 30 min |
| March | 40°F | 18°F | 28.9°F | 4.09 | 16.0 | 10 | <1 | 30 | 11 h 50 min |
| April | 54°F | 30°F | 41.8°F | 4.52 | 4.4 | 11 | <1 | 21 | 13 h 20 min |
| May | 66°F | 41°F | 53.6°F | 3.82 | 0.0 | 13 | <1 | 5 | 14 h 40 min |
| June | 74°F | 51°F | 62.4°F | 4.45 | 0.0 | 14 | 1 | <1 | 15 h 30 min |
| July | 79°F | 56°F | 67.4°F | 4.06 | 0.0 | 13 | 2 | <1 | 15 h 10 min |
| August | 78°F | 54°F | 65.9°F | 3.81 | 0.0 | 12 | 1 | <1 | 14 h |
| September | 70°F | 46°F | 58.1°F | 4.12 | 0.0 | 11 | <1 | 2 | 12 h 40 min |
| October | 57°F | 35°F | 46.1°F | 5.36 | 0.0 | 11 | <1 | 15 | 11 h 10 min |
| November | 45°F | 26°F | 35.5°F | 4.46 | 3.3 | 12 | <1 | 24 | 9 h 40 min |
| December | 34°F | 15°F | 24.6°F | 4.43 | 17.6 | 11 | <1 | 30 | 9 h |
| Year (annual) | 55°F | 32°F | 43.4°F | 49.70 | 77.9 | 138 | 4 | 185 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −2°C | −14°C | −8.1°C | 84 mm | 49 cm |
| February | 0°C | −14°C | −6.9°C | 84 mm | 44 cm |
| March | 5°C | −8°C | −1.7°C | 104 mm | 41 cm |
| April | 12°C | −1°C | 5.4°C | 115 mm | 11 cm |
| May | 19°C | 5°C | 12.0°C | 97 mm | 0 cm |
| June | 23°C | 10°C | 16.9°C | 113 mm | 0 cm |
| July | 26°C | 13°C | 19.7°C | 103 mm | 0 cm |
| August | 26°C | 12°C | 18.8°C | 97 mm | 0 cm |
| September | 21°C | 8°C | 14.5°C | 105 mm | 0 cm |
| October | 14°C | 2°C | 7.8°C | 136 mm | 0 cm |
| November | 7°C | −3°C | 1.9°C | 113 mm | 8 cm |
| December | 1°C | −9°C | −4.1°C | 113 mm | 45 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00172238; 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 East Hiram?
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 (11).
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 USC00172238.
When is the last frost at East Hiram?
In East Hiram, the last spring frost (32°F) comes after May 12 in half of years and after May 25 in one year in ten; the first autumn frost comes before October 1 in half of years and before September 19 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 121 year in 10 after May 25; 9 in 10 after May 1
- First autumn frost, half of years before
- October 11 year in 10 before September 19; 9 in 10 before October 12
NOAA puts the median frost-free season at 140 days, and the season without a hard freeze (28°F) at 165 days.
A hard freeze (28°F) comes after April 29 in half of springs and before October 11 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts East Hiram in zone 5a in ZIP code 04091, 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 5a: the coldest night of a typical year reaches −18°F (17 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 USC00172238; 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 East Hiram?
In a normal year in East Hiram, 4 days a year reach 90°F, 185 nights fall to 32°F or colder and 138 days bring measurable precipitation.
- Days at 90°F or more
- 4a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 185a normal year
- Days that stay below freezing
- 59high of 32°F or less
- Days with 0.01 inch of precipitation
- 138a normal year
- Days with 1 inch of snow or more
- 20a normal year
The highest temperature in this station's record (since 1965) is 102°F, on August 3, 1975; the lowest is −38°F, on January 9, 1968.
The wettest calendar year on that record is 2005, with 71.68 in; the snowiest season is 2007–08, with 135.4 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00172238; records: ACIS (NOAA Regional Climate Centers), station USC00172238. Records use complete months only; a month missing more than three days is left out.
How sunny is it at East Hiram?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds at East Hiram, 3.8 kWh per square metre a day. August is the sunniest month (79%) and December the cloudiest (64%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 67% | 1.7 |
| February | 69% | 2.5 |
| March | 69% | 3.6 |
| April | 70% | 4.7 |
| May | 69% | 5.3 |
| June | 70% | 5.6 |
| July | 77% | 5.9 |
| August | 79% | 5.3 |
| September | 78% | 4.3 |
| October | 70% | 2.8 |
| November | 68% | 1.8 |
| December | 64% | 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 East Hiram record?
A normal year at East Hiram brings 8,086 heating degree days, 51% more than the median U.S. place (5,373), and 265 cooling degree days, 71% 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 1,897 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,472 | 0 |
| February | 1,271 | 0 |
| March | 1,118 | 0 |
| April | 697 | 1 |
| May | 363 | 8 |
| June | 128 | 48 |
| July | 33 | 108 |
| August | 53 | 79 |
| September | 228 | 21 |
| October | 585 | 1 |
| November | 885 | 0 |
| December | 1,254 | 0 |
| Year (annual) | 8,086 | 265 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00172238. 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.
How does East Hiram's climate compare?
East Hiram is warmer than 18 of the 42 places with their own NOAA record in Maine, and wetter than 33. Across the 7,247 U.S. stations with normals, its annual mean of 43.4°F is warmer than 13%.
In the Köppen classification computed from these normals, East Hiram 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 East Hiram 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.
- Cornish, ME1,583 people · 6 mi S
- Kezar Falls, ME834 people · 8 mi SW
- Naples, ME4,062 people · 9 mi NE
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 East Hiram's climate
What is the coldest month at East Hiram?
January, with a normal high of 29°F and a normal low of 6°F. The warmest is July (79°F by day, 56°F at night).
Does it snow at East Hiram?
Yes: 78 inches in a normal year, falling on 29 days with 0.1 inch or more, the most in January (19.2 inches).
What is the rainiest month at East Hiram?
October, with 5.36 in of precipitation in a normal year; the driest is January with 3.29 in.
What plant hardiness zone is East Hiram in?
The USDA's 2023 map puts East Hiram in zone 5a in ZIP code 04091, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −18°F (17 years, 1991-2020): zone 5a.
How late can frost come at East Hiram?
In half of years the last 32°F night comes after May 12; in one year in ten it comes after May 25. Waiting until May 25 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Maine climateThe statewide normals and every place in the state
- Fryeburg, ME12 miles from this station, 44.7°F a year
- Bridgton, ME13 miles from this station, 43.8°F a year
- Windham (2 mi NW), ME14 miles from this station, 45.7°F a year
- West Buxton (2 mi NNW), ME15 miles from this station, 45.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made