Climate Chart of Harrisburg, USA
Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023
For Harrisburg, USA, the climate data describe 2013–2023.
Climate overview
Temperature
Monthly mean temperatures reach their highest point in July at 25.0 °C, while the lowest monthly mean is in January at -0.2 °C. These are monthly averages, not daytime maximum temperatures, so they describe the broader monthly pattern rather than the warmest or coldest conditions a particular day may bring. The unweighted mean across the monthly temperature means is 12.3 °C; it is a summary of those calendar-month averages, not a day-weighted annual average.
Rain
Mean daily rainfall is highest in September at 3.48 mm/day, and lowest in January at 1.75 mm/day. These figures are daily averages for each month, not monthly rainfall totals, and they do not show how often rain falls or guarantee the conditions on any given day. Across the calendar-month means, the unweighted mean daily rainfall is 2.74 mm/day; this provides an overall reference rather than a forecast for a specific date.
Sunshine
Mean daily sunshine duration is highest in July at 11.30 hours/day and lowest in December at 4.98 hours/day. These averages describe sunshine duration, not day length, and do not guarantee clear skies on an individual day.
Snow
Snowfall adds a winter detail: the highest monthly mean daily snowfall is in February at 6.24 mm/day. The unweighted mean of the monthly snowfall means is 1.73 mm/day, with both measures expressed as daily averages rather than monthly totals.
Best Travel Time Guide for Harrisburg, USA: Ideal Seasons and Weather Insights
If lower average rainfall is your priority, January is the conditional option, with mean daily rainfall of 1.75 mm/day. This does not guarantee dry days or indicate how frequently rain occurs, so keep plans flexible and check the forecast close to travel. For rain preparation, note that the highest mean daily rainfall is in September at 3.48 mm/day; packing a light rain layer is a practical precaution, while the average alone cannot predict rainfall on your dates.
Visitors prioritising cooler monthly averages can consider January, when the monthly mean temperature is -0.2 °C; bring layers, since a monthly mean does not describe daytime highs or day-to-day swings. For outdoor sightseeing planned around sunshine duration, July has the highest mean daily sunshine at 11.30 hours/day, while December has the lowest at 4.98 hours/day. These are averages, not guarantees of clear weather or measures of daylight length, so use them as planning context rather than a promise of conditions.
Climate Data Overview for Harrisburg, USA
Explore the comprehensive climate data for Harrisburg, USA. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.
| Month | Average: Temperature °C | Rain (mm) / day | Snow (mm) / day | Sunshine (h) / day |
|---|---|---|---|---|
| Jan | -0.2 | 1.75 | 5.14 | 5.56 |
| Feb | 0.7 | 2.10 | 6.24 | 6.21 |
| Mar | 4.6 | 2.03 | 4.72 | 7.51 |
| Apr | 11.1 | 3.19 | 0.61 | 8.54 |
| May | 16.8 | 2.96 | 0.00 | 9.57 |
| Jun | 21.8 | 3.41 | 0.00 | 11.02 |
| Jul | 25.0 | 3.39 | 0.00 | 11.30 |
| Aug | 23.8 | 3.06 | 0.00 | 10.41 |
| Sep | 20.4 | 3.48 | 0.00 | 8.98 |
| Oct | 14.2 | 2.73 | 0.00 | 7.17 |
| Nov | 6.7 | 2.11 | 1.36 | 6.65 |
| Dec | 3.0 | 2.71 | 2.74 | 4.98 |
| Average | 12.3 | 2.74 | 1.73 | 8.16 |
