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Harpers Ferry, IA Weather Tomorrow

Harpers Ferry weather tomorrow and 5 day forecast with this week's outlook featuring precipitation chances, day and night conditions, high and low temperatures in Fahrenheit and Celsius, sunrise, sunset, sky conditions, wind chill, and wind speed with direction for the Harpers Ferry area and around Allamakee county, Iowa.
Updated: Sun Sep 13th 2026 10:00 PM CDT
Harpers Ferry, IA Weather – 9-13 – Sunny
65° / 51°
Sunny
Harpers Ferry could see sunshine with daytime highs of 65°F and nighttime lows near 51°F. Rainfall predicted to have a 57% chance with an estimated 0.04in. Winds will be light at 9mph and gusts of 2.5mph at 11 PM. The humidity will be on the higher side, averaging about 66%, the maximum being 85% at 11 PM and 85% being its lowest at 11 PM. Barometric pressure is its highest of 30.19inHg at 11 PM, a lowest point of 30.19inHg at 11 PM with an avg 30.19inHg.
Harpers Ferry, IA Weather – 9-14 – Overcast
64° / 48°

Weather Tomorrow

Overcast
Harpers Ferry may see overcast, with daytime highs of 64°F and overnight lows near 48°F. Rainfall predicted to have a 70% chance with an estimated 0.11in. Wind will be moderate, blowing around 19mph on average and gusts of 42.3mph at 8 PM. The humidity will be on the higher side, averaging about 77%, the maximum being 92% at 8 PM and 51% being its lowest at 2 PM. Barometric pressure is its highest of 30.24inHg at 5 AM, a lowest point of 29.83inHg at 10 PM with an avg 30.09inHg.
Harpers Ferry, IA Weather – 9-15 – Overcast
68° / 59°
Overcast
Daytime highs will reach 68°F with lows dropping to 59°F in Harpers Ferry, where it will be overcast. The chance of rain is 85% with an estimated 0.72in. Wind will be moderate, blowing around 17mph on average and gusts of 41.9mph at 1 AM. The humidity will be on the higher side, averaging about 75%, the maximum being 98% at 7 AM and 47% being its lowest at 3 PM. Barometric pressure is its highest of 30.24inHg at 11 PM, a lowest point of 29.84inHg at 3 AM with an avg 30.03inHg.
Harpers Ferry, IA Weather – 9-16 – Overcast
67° / 56°
Overcast
Highs will reach 67°F with lows near 56°F in Harpers Ferry, where cloud-filled skies are. Rainfall predicted to have a 58% chance with an estimated 0.04in. Winds will be light at 8mph and gusts of 13mph at 8 AM. The humidity will be on the higher side, averaging about 72%, the maximum being 95% at 11 PM and 59% being its lowest at 10 AM. Barometric pressure is its highest of 30.35inHg at 11 AM, a lowest point of 30.24inHg at 5 PM with an avg 30.29inHg.
Harpers Ferry, IA Weather – 9-17 – Overcast
66° / 59°
Overcast
In Harpers Ferry, cloud-filled skies are likely with a high near 66°F and a low around 59°F. Rainfall predicted to have a 59% chance with an estimated 0.02in. Winds will be light at 7mph and gusts of 11.1mph at 11 PM. High humidity with average of 88% is anticipated, the maximum being 97% at 7 AM and 74% being its lowest at 5 PM. Barometric pressure is its highest of 30.3inHg at 1 PM, a lowest point of 30.24inHg at 5 PM with an avg 30.27inHg.
Harpers Ferry, IA Weather – 9-18 – Light Rain Shower
76° / 59°
Light Rain Shower
Rain is in the forecast for Harpers Ferry, with a high of 76°F and a low of 59°F. The chance of rain is 88% with an estimated 0.7in. Wind will be moderate, blowing around 15mph on average and gusts of 39.8mph at 10 PM. High humidity with average of 89% is anticipated, the maximum being 96% at 3 AM and 74% being its lowest at 1 PM. Barometric pressure is its highest of 30.25inHg at 1 AM, a lowest point of 29.81inHg at 11 PM with an avg 30.07inHg.

Currently

Clear 53°F
30.19 inHg.
Barometer
83%
Humidity
W 5.8 mph
Wind
Clear

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