Jonesboro, Maine climate: Climate normals at a NOAA weather station
Jonesboro's normal year runs from 9°F January nights to 76°F July afternoons, with 50.8 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.7°C, January lows of −13°C, July highs of 25°C, 1,291 mm of precipitation a year.
- NOAA stationJonesboro
- Station IDUSC00174183
- Location44.65°N 67.65°W
- Elevation194 ft (59 m)
On October 23, the normal high in Jonesboro is 54°F and the normal low 37°F, and the chance of measurable rain or snow is 31%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Jonesboro.
- Jan 29° 9°
- Feb 32° 12°
- Mar 39° 22°
- Apr 51° 32°
- May 61° 42°
- Jun 70° 51°
- Jul 76° 56°
- Aug 76° 55°
- Sep 69° 49°
- Oct 57° 39°
- Nov 46° 30°
- Dec 35° 19°
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 Jonesboro each month?
July is the warmest month, with normal highs of 76°F; January the coldest, with normal lows of 9°F. The most precipitation falls in December (5.90 in), the least in July (3.38 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 29°F | 9°F | 19.1°F | 4.30 | 11 | <1 | 30 | 9 h 10 min |
| February | 32°F | 12°F | 21.8°F | 3.77 | 9 | <1 | 26 | 10 h 20 min |
| March | 39°F | 22°F | 30.6°F | 4.64 | 11 | <1 | 27 | 11 h 50 min |
| April | 51°F | 32°F | 41.5°F | 4.26 | 10 | <1 | 18 | 13 h 30 min |
| May | 61°F | 42°F | 51.7°F | 3.90 | 11 | <1 | 2 | 14 h 50 min |
| June | 70°F | 51°F | 60.2°F | 3.53 | 11 | 1 | <1 | 15 h 30 min |
| July | 76°F | 56°F | 66.0°F | 3.38 | 10 | <1 | <1 | 15 h 20 min |
| August | 76°F | 55°F | 65.8°F | 3.59 | 8 | 1 | <1 | 14 h 10 min |
| September | 69°F | 49°F | 58.8°F | 3.50 | 9 | <1 | <1 | 12 h 40 min |
| October | 57°F | 39°F | 48.1°F | 5.00 | 9 | <1 | 9 | 11 h |
| November | 46°F | 30°F | 38.0°F | 5.07 | 9 | <1 | 20 | 9 h 40 min |
| December | 35°F | 19°F | 26.9°F | 5.90 | 10 | <1 | 29 | 8 h 50 min |
| Year (annual) | 54°F | 35°F | 44.0°F | 50.84 | 118 | 2 | 162 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −2°C | −13°C | −7.2°C | 109 mm |
| February | 0°C | −11°C | −5.7°C | 96 mm |
| March | 4°C | −6°C | −0.8°C | 118 mm |
| April | 11°C | 0°C | 5.3°C | 108 mm |
| May | 16°C | 6°C | 10.9°C | 99 mm |
| June | 21°C | 10°C | 15.7°C | 90 mm |
| July | 25°C | 13°C | 18.9°C | 86 mm |
| August | 25°C | 13°C | 18.8°C | 91 mm |
| September | 21°C | 9°C | 14.9°C | 89 mm |
| October | 14°C | 4°C | 8.9°C | 127 mm |
| November | 8°C | −1°C | 3.3°C | 129 mm |
| December | 2°C | −7°C | −2.8°C | 150 mm |
NOAA publishes no 1991-2020 snowfall normal for this station, and no record within 25 miles keeps one, so snow is left out here rather than estimated.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00174183; 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 Jonesboro?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, August has the fewest days with rain (8).
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 USC00174183.
When is the last frost at Jonesboro?
In Jonesboro, the last spring frost (32°F) comes after May 3 in half of years and after May 16 in one year in ten; the first autumn frost comes before October 9 in half of years and before September 27 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 31 year in 10 after May 16; 9 in 10 after April 22
- First autumn frost, half of years before
- October 91 year in 10 before September 27; 9 in 10 before October 29
NOAA puts the median frost-free season at 158 days, and the season without a hard freeze (28°F) at 185 days.
A hard freeze (28°F) comes after April 22 in half of springs and before October 24 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Jonesboro in zone 5b in ZIP code 04648, the nearest ZIP area.
Frost dates for every NOAA station in Maine · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00174183; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 Jonesboro?
In a normal year in Jonesboro, 2 days a year reach 90°F, 162 nights fall to 32°F or colder and 118 days bring measurable precipitation.
- Days at 90°F or more
- 2a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 162a normal year
- Days that stay below freezing
- 50high of 32°F or less
- Days with 0.01 inch of precipitation
- 118a normal year
The highest temperature in this station's record (since 1947) is 104°F, on August 3, 1975; the lowest is −25°F, on January 9, 1968.
The wettest calendar year on that record is 1979, with 70.52 in; the snowiest season is 1970–71, with 119.3 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00174183; records: ACIS (NOAA Regional Climate Centers), station USC00174183. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Jonesboro?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds at Jonesboro, 3.7 kWh per square metre a day. September is the sunniest month (77%) and December the cloudiest (59%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 62% | 1.5 |
| February | 66% | 2.4 |
| March | 69% | 3.6 |
| April | 68% | 4.7 |
| May | 67% | 5.3 |
| June | 70% | 5.7 |
| July | 75% | 5.8 |
| August | 77% | 5.2 |
| September | 77% | 4.2 |
| October | 69% | 2.7 |
| November | 63% | 1.6 |
| December | 59% | 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 many heating and cooling degree days does Jonesboro record?
A normal year at Jonesboro brings 7,788 heating degree days, 45% more than the median U.S. place (5,373), and 184 cooling degree days, 80% 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 1,741 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,423 | 0 |
| February | 1,208 | 0 |
| March | 1,068 | 0 |
| April | 705 | 0 |
| May | 414 | 2 |
| June | 168 | 23 |
| July | 45 | 76 |
| August | 42 | 69 |
| September | 199 | 15 |
| October | 524 | 1 |
| November | 810 | 0 |
| December | 1,181 | 0 |
| Year (annual) | 7,788 | 184 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00174183. 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 Jonesboro's climate compare?
Jonesboro is warmer than 20 of the 42 places with their own NOAA record in Maine, and wetter than 36. Across the 7,247 U.S. stations with normals, its annual mean of 44.0°F is warmer than 15%.
In the Köppen classification computed from these normals, Jonesboro 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 Jonesboro 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.
- Machias, ME2,060 people · 9 mi NE
- Jonesport, ME1,251 people · 8 mi S
- Milbridge, ME1,369 people · 14 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 Jonesboro's climate
What is the coldest month at Jonesboro?
January, with a normal high of 29°F and a normal low of 9°F. The warmest is July (76°F by day, 56°F at night).
What is the rainiest month at Jonesboro?
December, with 5.90 in of precipitation in a normal year; the driest is July with 3.38 in.
What plant hardiness zone is Jonesboro in?
The USDA's 2023 map puts Jonesboro in zone 5b in ZIP code 04648, the nearest ZIP area.
How late can frost come at Jonesboro?
In half of years the last 32°F night comes after May 3; in one year in ten it comes after May 16. Waiting until May 16 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Maine climateThe statewide normals and every place in the state
- Wesley, ME21 miles from this station, 44.3°F a year
- Acadia National Park, ME35 miles from this station, 47.3°F a year
- Eastport, ME37 miles from this station, 45.0°F a year
- Woodland, ME37 miles from this station, 46.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made