Best time to visit Exton
The best time to visit Exton is May and September–October, judged on twenty years of weather records and the events worth going for.
Exton, Pennsylvania, United States
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 4.7 °C / 40 °F | -2.5 °C / 28 °F | 77 mm / 3 in | neither best nor good |
| February | 6.3 °C / 43 °F | -1.9 °C / 29 °F | 85 mm / 3.4 in | neither best nor good |
| March | 11.5 °C / 53 °F | 2.1 °C / 36 °F | 96 mm / 3.8 in | neither best nor good |
| April | 17.6 °C / 64 °F | 7.6 °C / 46 °F | 100 mm / 3.9 in | good month |
| May | 22.9 °C / 73 °F | 13 °C / 55 °F | 99 mm / 3.9 in | best month |
| June | 27.6 °C / 82 °F | 18 °C / 64 °F | 113 mm / 4.5 in | good month |
| July | 30.2 °C / 86 °F | 21.1 °C / 70 °F | 120 mm / 4.7 in | neither best nor good |
| August | 28.7 °C / 84 °F | 19.7 °C / 67 °F | 106 mm / 4.2 in | good month |
| September | 25.2 °C / 77 °F | 16.1 °C / 61 °F | 106 mm / 4.2 in | best month |
| October | 19.1 °C / 66 °F | 9.9 °C / 50 °F | 100 mm / 3.9 in | best month |
| November | 12.5 °C / 55 °F | 3.7 °C / 39 °F | 75 mm / 3 in | good month |
| December | 7.3 °C / 45 °F | 0.1 °C / 32 °F | 107 mm / 4.2 in | neither best nor good |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: good
- MMay: best
- JJune: good
- JJuly: neither
- AAugust: good
- SSeptember: best
- OOctober: best
- NNovember: good
- DDecember: neither
- Best
- May, September–October
- Good
- April, June, August, November
Why these months
April · good
In its favour: feels like (high) 15.1 °C / 59 °F, share of daylight that is sunny 71%, average daily high 17.6 °C / 64 °F, precipitation 100 mm / 3.9 in, days with heavy rain 3 days, relative humidity 58%, wet days 10.2 days, average daily low 7.6 °C / 46 °F.
May · best
In its favour: feels like (high) 22.6 °C / 73 °F, average daily high 22.9 °C / 73 °F, share of daylight that is sunny 72%, precipitation 99 mm / 3.9 in, average daily low 13 °C / 55 °F, relative humidity 65%, days with heavy rain 3.5 days, wet days 11.4 days.
June · good
In its favour: feels like (high) 29 °C / 84 °F, share of daylight that is sunny 77%, average daily high 27.6 °C / 82 °F, precipitation 113 mm / 4.5 in, average daily low 18 °C / 64 °F, relative humidity 66%, days with heavy rain 4.2 days, wet days 11.9 days.
August · good
In its favour: share of daylight that is sunny 79%, precipitation 106 mm / 4.2 in, average daily high 28.7 °C / 84 °F, days with heavy rain 3.5 days, wet days 10.9 days, average daily low 19.7 °C / 67 °F, relative humidity 69%.
Against: feels like (high) 30.8 °C / 87 °F.
September · best
In its favour: feels like (high) 26 °C / 79 °F, average daily high 25.2 °C / 77 °F, share of daylight that is sunny 73%, precipitation 106 mm / 4.2 in, wet days 9.2 days, days with heavy rain 3 days, average daily low 16.1 °C / 61 °F, relative humidity 71%.
October · best
In its favour: feels like (high) 17.6 °C / 64 °F, average daily high 19.1 °C / 66 °F, share of daylight that is sunny 70%, precipitation 100 mm / 3.9 in, wet days 8.8 days, days with heavy rain 3.3 days, average daily low 9.9 °C / 50 °F, relative humidity 70%.
November · good
In its favour: share of daylight that is sunny 72%, precipitation 75 mm / 3 in, wet days 8 days, days with heavy rain 2.9 days, relative humidity 65%.
Against: feels like (high) 9.4 °C / 49 °F, average daily high 12.5 °C / 55 °F, average daily low 3.7 °C / 39 °F.
Hiking and trekking
Cool enough to climb in, dry enough to enjoy, long enough days.
- JJanuary: neither
- FFebruary: neither
- MMarch: best
- AApril: best
- MMay: best
- JJune: neither
- JJuly: neither
- AAugust: neither
- SSeptember: good
- OOctober: best
- NNovember: best
- DDecember: neither
- Best
- March–May, October–November
- Good
- September
Why these months
March · best
In its favour: average daily high 11.5 °C / 53 °F, precipitation 96 mm / 3.8 in, share of daylight that is sunny 70%, daylight per day 12 h, wet days 10.1 days, days with heavy rain 3 days, average daily low 2.1 °C / 36 °F, feels like (high) 7.8 °C / 46 °F, wind (daily max) 19 km/h / 12 mph.
April · best
In its favour: average daily high 17.6 °C / 64 °F, precipitation 100 mm / 3.9 in, feels like (high) 15.1 °C / 59 °F, average daily low 7.6 °C / 46 °F, share of daylight that is sunny 71%, daylight per day 13.3 h, wet days 10.2 days, days with heavy rain 3 days, wind (daily max) 19 km/h / 11 mph.
May · best
In its favour: average daily high 22.9 °C / 73 °F, precipitation 99 mm / 3.9 in, average daily low 13 °C / 55 °F, share of daylight that is sunny 72%, daylight per day 14.4 h, feels like (high) 22.6 °C / 73 °F, wet days 11.4 days, days with heavy rain 3.5 days, wind (daily max) 16 km/h / 10 mph.
September · good
In its favour: precipitation 106 mm / 4.2 in, average daily high 25.2 °C / 77 °F, wet days 9.2 days, share of daylight that is sunny 73%, daylight per day 12.4 h, days with heavy rain 3 days, wind (daily max) 14 km/h / 9 mph, average daily low 16.1 °C / 61 °F, feels like (high) 26 °C / 79 °F.
October · best
In its favour: average daily high 19.1 °C / 66 °F, precipitation 100 mm / 3.9 in, wet days 8.8 days, feels like (high) 17.6 °C / 64 °F, average daily low 9.9 °C / 50 °F, share of daylight that is sunny 70%, days with heavy rain 3.3 days, daylight per day 11.1 h, wind (daily max) 16 km/h / 10 mph.
November · best
In its favour: average daily high 12.5 °C / 55 °F, precipitation 75 mm / 3 in, wet days 8 days, share of daylight that is sunny 72%, average daily low 3.7 °C / 39 °F, days with heavy rain 2.9 days, feels like (high) 9.4 °C / 49 °F, wind (daily max) 17 km/h / 11 mph.
Against: daylight per day 10 h.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Blue Mountain Resort, 87 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | 0.5 °C | 2.1 °C | 7.8 °C | 15.1 °C | 22.6 °C | 29 °C | 33 °C | 30.8 °C | 26 °C | 17.6 °C | 9.4 °C | 3.7 °C |
| Days with heavy rain | 2.4 days | 3 days | 3 days | 3 days | 3.5 days | 4.2 days | 4.8 days | 3.5 days | 3 days | 3.3 days | 2.9 days | 3.9 days |
| Time rain usually falls | 3 am | 1 pm | 6 pm | 10 am | 2 pm | 5 pm | 5 pm | 5 pm | 5 pm | 3 pm | 2 am | 2 am |
| Sunshine per day | 6.6 h | 7.4 h | 8.4 h | 9.5 h | 10.3 h | 11.5 h | 12 h | 10.8 h | 9.1 h | 7.8 h | 7.2 h | 6 h |
| Relative humidity | 62% | 61% | 58% | 58% | 65% | 66% | 68% | 69% | 71% | 70% | 65% | 67% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 9.9 µg/m³ | 11 µg/m³ | 8.7 µg/m³ | 9.9 µg/m³ | 11.8 µg/m³ | 16.4 µg/m³ | 15.6 µg/m³ | 12.8 µg/m³ | 10.2 µg/m³ | 8.3 µg/m³ | 8.7 µg/m³ | 10.7 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 19.2 µg/m³ | 20.9 µg/m³ | 16 µg/m³ | 16.5 µg/m³ | 19.9 µg/m³ | 26.6 µg/m³ | 25 µg/m³ | 20.7 µg/m³ | 16.8 µg/m³ | 13.6 µg/m³ | 16.4 µg/m³ | 19.6 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.