Derby, Iowa 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 83°F 28°C Heat Index: 92°F	Observed at: Derby, IA	Elevation: 877 ft | 267 m
	Last Updated: July 27, 8:30 PM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 83°F | 28°C
	Pressure: 28.69 in | 971.6 mb	Dewpoint: 77°F | 25°C
	Humidity: 81%	Wind: SW 5 mph | SW 8 kph
	Feels Like: 93°F | 34°C	Visibility: 35.9 mi | 57.7 km
	Lat/Long: 40.8163 | -93.1305	Sunrise: 6:04 AM   Sunset: 8:33 PM

7 Day Graphical Forecast

Valid: 11:17 AM 7/28/2026

Today Overcast 94 |78 °F 34 |26 °C 33% Chance Precipitation Tuesday Overcast 93 |73 °F 34 |23 °C 3% Chance Precipitation Wednesday Clear 88 |68 °F 31 |20 °C 5% Chance Precipitation Thursday Drizzle 81 |64 °F 27 |18 °C 11% Chance Precipitation Friday Light Showers 68 |63 °F 20 |17 °C 64% Chance Precipitation Saturday Overcast 80 |60 °F 27 |15 °C 37% Chance Precipitation Sunday Partly Cloudy 86 |64 °F 30 |18 °C 7% Chance Precipitation

7 Hour Graphical Forecast

Valid: 11:17 AM 7/28/2026

11 AM Clear 85 °F 2% Chance Precipitation

12 PM Overcast 88 °F 2% Chance Precipitation

1 PM Overcast 89 °F 2% Chance Precipitation

2 PM Overcast 91 °F 2% Chance Precipitation

3 PM Overcast 93 °F 3% Chance Precipitation

4 PM Overcast 93 °F 2% Chance Precipitation

5 PM Overcast 92 °F 3% Chance Precipitation

7 Day Textual Forecast - with QPF, Max Wind, Humidity, Snowfall & UV Index

7 Day & Night Weather Forecast for Derby, IA - (Fahrenheit & Celsius) Valid: 11:17 AM 7/28/2026 Today Overcast with a high near 94°F [34°C]. SW wind to around 12 mph [19 kph], with gusts to near 18 mph [29 kph]. Dewpoint near 77°F [25°C] with humidity of 91%. Pressure around 28.69 in [971.6 mb]. UV Index: 7.8. Chance of precipitation 33% with QPF of 0.00 in [0.0 mm]. Tonight Overcast with a low around 78°F [26°C]. SW wind to around 12 mph [19 kph], with gusts to near 18 mph [29 kph]. Chance of precipitation 33% with QPF of 0.00 in [0.0 mm]. Tuesday Overcast with a high near 93°F [34°C]. NNE wind to around 10 mph [16 kph], with gusts to near 16 mph [25 kph]. Dewpoint near 77°F [25°C] with humidity of 92%. Pressure around 28.69 in [971.6 mb]. UV Index: 5.3. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm]. Tuesday Night Overcast with a low around 73°F [23°C]. NNE wind to around 10 mph [16 kph], with gusts to near 16 mph [25 kph]. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm]. Wednesday Clear with a high near 88°F [31°C]. SE wind to around 12 mph [19 kph], with gusts to near 19 mph [31 kph]. Dewpoint near 77°F [25°C] with humidity of 74%. Pressure around 28.69 in [971.6 mb]. UV Index: 7.7. Chance of precipitation 5% with QPF of 0.00 in [0.0 mm]. Wednesday Night Clear with a low around 68°F [20°C]. SE wind to around 12 mph [19 kph], with gusts to near 19 mph [31 kph]. Chance of precipitation 5% with QPF of 0.00 in [0.0 mm]. Thursday Drizzle with a high near 81°F [27°C]. SSE wind to around 16 mph [25 kph], with gusts to near 37 mph [59 kph]. Dewpoint near 77°F [25°C] with humidity of 86%. Pressure around 28.69 in [971.6 mb]. UV Index: 4.25. Chance of precipitation 11% with QPF of 0.05 in [1.2 mm]. Thursday Night Drizzle with a low around 64°F [18°C]. SSE wind to around 16 mph [25 kph], with gusts to near 37 mph [59 kph]. Chance of precipitation 11% with QPF of 0.05 in [1.2 mm]. Friday Light Showers with a high near 68°F [20°C]. ESE wind to around 14 mph [23 kph], with gusts to near 34 mph [54 kph]. Dewpoint near 77°F [25°C] with humidity of 98%. Pressure around 28.69 in [971.6 mb]. UV Index: 0.95. Chance of precipitation 64% with QPF of 0.31 in [7.9 mm]. Friday Night Light Showers with a low around 63°F [17°C]. ESE wind to around 14 mph [23 kph], with gusts to near 34 mph [54 kph]. Chance of precipitation 64% with QPF of 0.31 in [7.9 mm]. Saturday Overcast with a high near 80°F [27°C]. NNE wind to around 12 mph [19 kph], with gusts to near 20 mph [32 kph]. Dewpoint near 77°F [25°C] with humidity of 99%. Pressure around 28.69 in [971.6 mb]. UV Index: 7.35. Chance of precipitation 37% with QPF of 0.00 in [0.0 mm]. Saturday Night Overcast with a low around 60°F [15°C]. NNE wind to around 12 mph [19 kph], with gusts to near 20 mph [32 kph]. Chance of precipitation 37% with QPF of 0.00 in [0.0 mm]. Sunday Partly Cloudy with a high near 86°F [30°C]. N wind to around 8 mph [12 kph], with gusts to near 16 mph [25 kph]. Dewpoint near 77°F [25°C] with humidity of 92%. Pressure around 28.69 in [971.6 mb]. UV Index: 7.5. Chance of precipitation 7% with QPF of 0.00 in [0.0 mm]. Sunday Night Partly Cloudy with a low around 64°F [18°C]. N wind to around 8 mph [12 kph], with gusts to near 16 mph [25 kph]. Chance of precipitation 7% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Derby, IA

Today: 0.0 mm | 0.00 in

Tonight: 0.0 mm | 0.00 in

Tuesday: 0.0 mm | 0.00 in

Tuesday Night: 0.0 mm | 0.00 in

Wednesday: 0.0 mm | 0.00 in

Wednesday Night: 0.0 mm | 0.00 in

Thursday: 1.2 mm | 0.05 in

Thursday Night: 1.2 mm | 0.05 in

Friday: 7.9 mm | 0.31 in

Friday Night: 7.9 mm | 0.31 in

Saturday: 0.0 mm | 0.00 in

Saturday Night: 0.0 mm | 0.00 in

Sunday: 0.0 mm | 0.00 in

Sunday Night: 0.0 mm | 0.00 in

7 Day and Night - Maximum Wind Speed Forecast for Derby, IA

Today: SW @ 19 kph | 12 mph

Tonight: SW @ 19 kph | 12 mph

Tuesday: NNE @ 16 kph | 10 mph

Tuesday Night: NNE @ 16 kph | 10 mph

Wednesday: SE @ 19 kph | 12 mph

Wednesday Night: SE @ 19 kph | 12 mph

Thursday: SSE @ 25 kph | 16 mph

Thursday Night: SSE @ 25 kph | 16 mph

Friday: ESE @ 23 kph | 14 mph

Friday Night: ESE @ 23 kph | 14 mph

Saturday: NNE @ 19 kph | 12 mph

Saturday Night: NNE @ 19 kph | 12 mph

Sunday: N @ 12 kph | 8 mph

Sunday Night: N @ 12 kph | 8 mph

7 Day and Night - Maximum Humidity Forecast for Derby, IA

Today: 91 %

Tonight: 91 %

Tuesday: 92 %

Tuesday Night: 92 %

Wednesday: 74 %

Wednesday Night: 74 %

Thursday: 86 %

Thursday Night: 86 %

Friday: 98 %

Friday Night: 98 %

Saturday: 99 %

Saturday Night: 99 %

Sunday: 92 %

Sunday Night: 92 %

7 Day and Night - Snowfall Totals Forecast for Derby, IA

Today: 0.0 cm | 0.00 in

Tonight: 0.0 cm | 0.00 in

Tuesday: 0.0 cm | 0.00 in

Tuesday Night: 0.0 cm | 0.00 in

Wednesday: 0.0 cm | 0.00 in

Wednesday Night: 0.0 cm | 0.00 in

Thursday: 0.0 cm | 0.00 in

Thursday Night: 0.0 cm | 0.00 in

Friday: 0.0 cm | 0.00 in

Friday Night: 0.0 cm | 0.00 in

Saturday: 0.0 cm | 0.00 in

Saturday Night: 0.0 cm | 0.00 in

Sunday: 0.0 cm | 0.00 in

Sunday Night: 0.0 cm | 0.00 in

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