Middletown Harrisburg, PA Climate: Temperature & Rain by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from Middletown Harrisburg's primary NOAA station, MIDDLETOWN HARRISBURG INTL AP.
The climate verdict for Middletown Harrisburg
Middletown Harrisburg, Pennsylvania has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 54°F. Its climate comfort score of 63/100 (good) lands mid-pack nationally, exceeding 46% of station-mapped location scores.
- 54°F
- yearly average temperature, NOAA normal
- 63/100
- comfort score, above 46% of station-mapped location scores
- 44.2"
- annual precipitation · 30" snow
- 207 days
- growing season, frost-free days
Middletown Harrisburg: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00014711 · Middletown Harrisburg, PA 54°F mean · 44.2" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 54°F
- RANK-MID #3,979
- PHOTO-FINISH ≈ Shakamak State…
- PRCP-MID 44.2"
- SWING-WIDE 47°F
- COMF-MID 63/100
- LOAD-HEAT 5,024 HDD
- STN-1 USW00014711
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Shakamak State Park, IN (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every PA station list.
- Middletown Harr… (this station) 54°F
- Cold Shelbyville, IN 54°F
- Hot Pleasant Grove, UT 54°F
- Near Shakamak State…, IN 54°F
- Near Freelandville, IN 54°F
Climate Living Index · Middletown Harrisburg
Middletown Harrisburg: 63/100 · grade C
Middletown Harrisburg publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Middletown Harrisburg, not an official NOAA rating. Rankings still use Comfort Score 63/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 107 calendar days | 72/100 · B |
| Frost-free season | 207 days/year | 69/100 · C |
| Precipitation balance | 44.2 in · 9.2 from 35 in | 68/100 · C |
| Annual temperature balance | 54.3°F · 13.2° from 67.5°F | 57/100 · C |
| Snowfall burden | 29.9 inches/year | 38/100 · F |
Middletown Harrisburg · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Middletown Harrisburg is a continental Köppen climate: Dfa
Coldest-month mean 30.8°F and warmest-month mean 77.3°F place this station in continental, no dry season, hot summer climates (Dfa). Class Dfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, hot summer.
- Köppen code
- Dfa
- Group
- Continental
- Warmest month
- 77.3°F
- Coldest month
- 30.8°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Middletown Harrisburg sits across the climate record
Three NOAA fields for Middletown Harrisburg's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 58th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 67th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- 66th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Middletown Harrisburg compares across U.S. station-mapped locations
Middletown Harrisburg's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
63 46th percentile score exceeds 46% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). This entry sits in this band.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Middletown Harrisburg's measured station temperature trend
MethodologyAcross 34 complete annual observations from 1992 to 2025, MIDDLETOWN HARRISBURG INTL AP warmed at a fitted rate of 0.41°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Middletown Harrisburg primary station fitted change +0.41 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 39°F (4°C) | 23°F (-5°C) | 31°F (-1°C) | 3.0" | 9.1" | 25.6 | 0.0 |
| February | 42°F (6°C) | 25°F (-4°C) | 33°F (1°C) | 2.6" | 9.4" | 23.1 | 0.0 |
| March | 51°F (11°C) | 32°F (0°C) | 42°F (5°C) | 3.7" | 5.6" | 16.2 | 0.0 |
| April | 64°F (18°C) | 43°F (6°C) | 53°F (12°C) | 3.5" | 0.4" | 2.7 | 0.1 |
| May | 74°F (23°C) | 53°F (12°C) | 63°F (17°C) | 3.8" | 0.0" | 0.0 | 1.1 |
| June | 82°F (28°C) | 63°F (17°C) | 73°F (23°C) | 4.0" | 0.0" | 0.0 | 4.1 |
| July | 87°F (30°C) | 68°F (20°C) | 77°F (25°C) | 4.7" | 0.0" | 0.0 | 9.3 |
| August | 85°F (29°C) | 66°F (19°C) | 75°F (24°C) | 3.8" | 0.0" | 0.0 | 5.5 |
| September | 78°F (25°C) | 58°F (15°C) | 68°F (20°C) | 4.8" | 0.0" | 0.0 | 1.8 |
| October | 66°F (19°C) | 46°F (8°C) | 56°F (13°C) | 3.8" | 0.2" | 0.6 | 0.0 |
| November | 54°F (12°C) | 36°F (2°C) | 45°F (7°C) | 3.0" | 0.8" | 10.5 | 0.0 |
| December | 43°F (6°C) | 28°F (-2°C) | 36°F (2°C) | 3.4" | 4.4" | 22.4 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 87°F around July 13, short of 90°F on every date, while 107 dates carry a normal low at or below freezing, the coldest 22°F near January 23.
The freezing stretch
The normal low stays at or below 32°F into March 15, then returns to freezing around November 30, covering 107 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is May 16, when 42% of years recorded at least a hundredth of an inch. The driest is November 2 at 28%. Summed across the calendar, that is about 126 wet dates a year.
The widest day
April 21 carries the biggest normal gap between afternoon and dawn, 22°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Middletown Harrisburg.
Where Middletown Harrisburg Stands Nationally
Days and nights track unusually close together; the widest normal swing, about 22°F, is narrower than most stations record.
Middletown Harrisburg earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 9.1"
10.9 days with precipitation
Snow: 9.4"
10.4 days with precipitation
Snow: 5.6"
11.0 days with precipitation
Snow: 0.4"
11.4 days with precipitation
13.0 days with precipitation
11.5 days with precipitation
10.9 days with precipitation
10.0 days with precipitation
9.2 days with precipitation
Snow: 0.2"
9.2 days with precipitation
Snow: 0.8"
8.5 days with precipitation
Snow: 4.4"
10.3 days with precipitation
Middletown Harrisburg spreads its precipitation across the year
Neither half of the year dominates here: June through August take 28% of the annual total and December through February 20%, with neither reaching the 35% that would mark a distinct wet season. Middletown Harrisburg has no dry season to plan around, though it does carry a wide 46.5°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: September averages 4.8" and February 2.6". The three wettest months together take 31% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in Middletown Harrisburg, it arrives in quantity
44.2" of precipitation falls across only about 126 wet days here, averaging 0.35 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 126 a year, 35% of all days
- Average depth per wet day
- 0.35 inches
- Most wet days
- May, about 13
- Fewest wet days
- November, about 9
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Winter brings real snow to Middletown Harrisburg
Middletown Harrisburg averages 29.9 inches of snowfall a year, with February the snowiest month on the normals, spread across roughly 16 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 29.9 inches of depth.
- Days recording measurable snow: about 16 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 7% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
November 2
50% probability date
Last Spring Freeze
April 9
50% probability date
Growing Season
207 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,024
Higher = more heating needed
Cooling Degree Days
1,171
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside PA closest to Middletown Harrisburg on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (54°F here).
- Battle Mountain, NV 54°F · 0.0°F off
- Bedford, IN 54°F · 0.0°F off
- Beloit, KS 54°F · 0.0°F off
- Caesars Head, SC 54°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (44.2" here), excluding temperature-peer places.
- Pittsfield, MA 44.2" · 0.0" off
- Washington, GA 44.2" · 0.0" off
- Parkersburg, WV 44.2" · 0.0" off
- Centerburg, OH 44.2" · 0.0" off
Snow and freeze rhythm
When cold and snow define Middletown Harrisburg
heating led · moderate · mid swing
Middletown Harrisburg's energy balance leans toward cold weather: 5,024 annual heating degree days against 1,171 for cooling. Its 46.5°F seasonal range still makes the monthly rows more useful than the annual average alone.
Middletown Harrisburg's frost-free season lasts about 207 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Middletown Harrisburg coldest normal
January
The monthly mean of 31°F (-1°C) sits near freezing, so cold nights and above-freezing afternoons share the same month.
-
2. Middletown Harrisburg typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Middletown Harrisburg snow peak
February
Middletown Harrisburg averages 29.9 inches of snow a year, with February the snowiest month on the normals.
Questions about Middletown Harrisburg's climate
How much snow does Middletown Harrisburg get? ▼
How cold does Middletown Harrisburg get in winter? ▼
How much energy does heating and cooling require in Middletown Harrisburg? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Middletown Harrisburg's primary station: MIDDLETOWN HARRISBURG INTL AP (USW00014711). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Middletown Harrisburg; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Middletown Harrisburg comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.