Monthly climate averages for Harleysville, United States. Based on 10-year ERA5 reanalysis data.
Cfa Humid Subtropical
Climate OverviewHarleysville, United States in March has mild conditions, with highs averaging 11.4°C (53°F) and noticeably cooler mornings. Rain falls on about 11 days this month.
This month falls at the beginning of Spring.
Daily highs in March gradually rise from around 9°C (48°F) at the start to 14°C (57°F) by month's end.
March sees fairly even rainfall, totalling about 94 mm across the month.
The warmest days tend to fall around the 31th, averaging 15.1°C (59°F).
Compared to February, this month is about 4°C warmer with 1 more rainy days. Temperatures will rise further into April.
Daily averages based on historical data (2016–2025)
| Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 4°C / -2°C | 0°C / -7°C | 10days (85 mm) Wet | 5.8h Fair | 66% Muggy | 2.3 Moderate | Poor | View Details |
| February | 7°C / -1°C | 4°C / -6°C | 10days (90 mm) Wet | 6.6h Fair | 68% Muggy | 3.2 Moderate | Poor | View Details |
| March | 11°C / 2°C | 8°C / -2°C | 11days (95 mm) Wet | 8.1h Good | 65% Muggy | 4.4 Moderate | Poor | View Details |
| April | 17°C / 7°C | 15°C / 4°C | 11days (104 mm) Wet | 8.8h Good | 66% Muggy | 5.1 High | Fair | View Details |
| May best | 22°C / 12°C | 22°C / 11°C | 13days (123 mm) Wet | 9.2h Good | 73% Muggy | 5.7 High | Excellent | View Details |
| June best | 27°C / 17°C | 29°C / 18°C | 12days (99 mm) Wet | 11.2h Excellent | 70% Muggy | 6.7 High | Excellent | View Details |
| July | 30°C / 21°C | 34°C / 23°C | 14days (139 mm) Wet | 11.5h Excellent | 73% Muggy | 7 High | Fair | View Details |
| August best | 29°C / 20°C | 31°C / 22°C | 12days (123 mm) Wet | 10.2h Excellent | 75% Muggy | 6.2 High | Good | View Details |
| September best | 25°C / 17°C | 26°C / 17°C | 10days (100 mm) Wet | 8.5h Good | 74% Muggy | 4.9 Moderate | Excellent | View Details |
| October best | 19°C / 11°C | 18°C / 9°C | 9days (84 mm) Wet | 7.3h Good | 73% Muggy | 4 Moderate | Good | View Details |
| November | 12°C / 4°C | 9°C / 0°C | 8days (79 mm) Wet | 7h Good | 69% Muggy | 2.7 Moderate | Fair | View Details |
| December | 6°C / 0°C | 3°C / -5°C | 11days (101 mm) Wet | 5.6h Fair | 71% Muggy | 2 Low | Poor | View Details |
Bundle up with a warm coat, scarf, and closed-toe shoes. Thermal layers underneath give flexibility between indoors and outdoors.
A waterproof jacket or compact umbrella is recommended for occasional showers.
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