Harrisburg weather in January: Harrisburg, Pennsylvania: normal highs, lows, rain and records for January
Harrisburg in January has a normal high of 40°F and a normal low of 25°F, a daily mean of 33°F, holding near 40°F all month. Measurable precipitation falls on 9 days in a normal January, 2.64 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 5°C and low of −4°C, 67 mm of precipitation in January.
- NOAA stationHarrisburg Capitol Cy Airport
- Station IDUSW00014751
- Location40.22°N 76.85°W
- Elevation340 ft (104 m)
- From the center4 miles
- Population50,649
- Jan 40° 25°
- Feb 43° 26°
- Mar 53° 34°
- Apr 65° 43°
- May 75° 53°
- Jun 83° 63°
- Jul 88° 67°
- Aug 85° 66°
- Sep 79° 58°
- Oct 67° 47°
- Nov 55° 37°
- Dec 44° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Harrisburg in January?
The normal high is 40°F and the normal low 25°F, for a daily mean of 32.6°F. January is 4.4°F cooler than December and 2.1°F cooler than February. January is the 12th warmest month of the year in Harrisburg and the 11th wettest. From one year to the next January's mean temperature typically moves about 4.2°F either way (NOAA's standard deviation), so roughly two Januarys in three average between 28°F and 37°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 32%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| January 1 | 41°F | 26°F | 32% | 20% |
| January 8 | 40°F | 25°F | 31% | 19% |
| January 15 | 40°F | 25°F | 31% | 18% |
| January 22 | 40°F | 24°F | 31% | 17% |
| January 31 | 41°F | 24°F | 31% | 17% |
Every day of January: normal high, low and chance of precipitation (warmest afternoon January 1, coldest night January 22)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| January 1 | 41°F | 26°F | 32% | 20% | 9 h 20 min |
| January 2 | 41°F | 26°F | 32% | 20% | 9 h 20 min |
| January 3 | 41°F | 26°F | 32% | 19% | 9 h 20 min |
| January 4 | 41°F | 26°F | 32% | 19% | 9 h 20 min |
| January 5 | 41°F | 26°F | 31% | 19% | 9 h 20 min |
| January 6 | 41°F | 26°F | 31% | 19% | 9 h 30 min |
| January 7 | 41°F | 26°F | 31% | 19% | 9 h 30 min |
| January 8 | 40°F | 25°F | 31% | 19% | 9 h 30 min |
| January 9 | 40°F | 25°F | 31% | 18% | 9 h 30 min |
| January 10 | 40°F | 25°F | 31% | 18% | 9 h 30 min |
| January 11 | 40°F | 25°F | 31% | 18% | 9 h 30 min |
| January 12 | 40°F | 25°F | 31% | 18% | 9 h 30 min |
| January 13 | 40°F | 25°F | 31% | 18% | 9 h 30 min |
| January 14 | 40°F | 25°F | 31% | 18% | 9 h 30 min |
| January 15 | 40°F | 25°F | 31% | 18% | 9 h 40 min |
| January 16 | 40°F | 25°F | 31% | 18% | 9 h 40 min |
| January 17 | 40°F | 25°F | 31% | 18% | 9 h 40 min |
| January 18 | 40°F | 25°F | 31% | 18% | 9 h 40 min |
| January 19 | 40°F | 25°F | 31% | 17% | 9 h 40 min |
| January 20 | 40°F | 24°F | 31% | 17% | 9 h 40 min |
| January 21 | 40°F | 24°F | 31% | 17% | 9 h 50 min |
| January 22 | 40°F | 24°F | 31% | 17% | 9 h 50 min |
| January 23 | 40°F | 24°F | 31% | 17% | 9 h 50 min |
| January 24 | 40°F | 24°F | 31% | 17% | 9 h 50 min |
| January 25 | 40°F | 24°F | 31% | 17% | 9 h 50 min |
| January 26 | 40°F | 24°F | 31% | 17% | 9 h 50 min |
| January 27 | 40°F | 24°F | 31% | 17% | 10 h |
| January 28 | 40°F | 24°F | 31% | 17% | 10 h |
| January 29 | 40°F | 24°F | 31% | 17% | 10 h |
| January 30 | 41°F | 24°F | 31% | 17% | 10 h |
| January 31 | 41°F | 24°F | 31% | 17% | 10 h |
- Normal high
- 40°FJanuary average
- Normal low
- 25°FJanuary average
- Precipitation
- 2.64 inmonth total
- Days with precipitation
- 90.01 inch or more
- Nights at 32°F or colder
- 26
- Daylight
- 9 h 20 min to 10 hJanuary 1 to January 31
- Sunshine
- 63%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014751; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Harrisburg in January?
On a given January day the chance of 0.01 inch or more is 31% on average, highest around January 1 (32%). In all, 2.64 in falls on 9 days of a normal January.
In a normal January in Harrisburg, 26 nights fall to freezing and 8 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014751.
What are the records for January in Harrisburg?
The warmest January temperature on this station's record (since 1939) is 73°F, on January 26, 1950; the coldest is −9°F, on January 22, 1984. The wettest January brought 8.01 in (1979); the snowiest, 34.0 inches (1961).
The January mean against the 1991-2020 normal of 32.6°F: 2021 35.2°F (+2.6), 2022 29.1°F (−3.5), 2023 41.3°F (+8.7), 2024 36.0°F (+3.4), 2025 27.9°F (−4.7), 2026 26.9°F (−5.7). 3 of 6 ran warmer than normal.
| January | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 35.2°F | +2.6°F | 1.61 in |
| 2022 | 29.1°F | −3.5°F | 2.10 in |
| 2023 | 41.3°F | +8.7°F | 2.25 in |
| 2024 | 36.0°F | +3.4°F | 5.49 in |
| 2025 | 27.9°F | −4.7°F | 0.60 in |
| 2026 | 26.9°F | −5.7°F | 1.53 in |
Source: records: ACIS, station USW00014751; recent months: ACIS, station USW00014751. Records and recent months use complete months only.
How does January in Harrisburg compare across Pennsylvania?
Across the 108 places PlainClimate covers in Pennsylvania, January normal highs run from 29°F in Laporte to 43°F in Marcus Hook; Harrisburg's is 40°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Harrisburg in December44°F by day, 30°F at night
- Harrisburg in February43°F by day, 26°F at night
- Harrisburg through the yearEvery month, frost dates, records and recent years
- Pennsylvania in JanuaryThe statewide normal and the warmest and coolest places
- Marcus Hook: Pennsylvania's warmest Januarynormal high 43°F