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As of 17:12 CDT

Weather in Derby, IA

82°Current weather

Derby, Saturday, 8 August, 17:12

Partly cloudy. Feels like 85°. High 82°, low 62°.

Pressure30.00 inHg
Wind7.9 mph SE
Humidity63%
Visibility6.2 mi
Dew point69°
Sun, 0993° / 71°0.01Light rain
93 °Light rain

Derby, Sunday, 9 August

Light rain. High 93°, low 71°.

Pressure29.77 inHg
Wind17.3 mph SW
Humidity66%
Visibility6.2 mi
Dew point72°
Mon, 1084° / 69°0.06Light rain
84 °Light rain

Derby, Monday, 10 August

Light rain. High 84°, low 69°.

Pressure29.83 inHg
Wind9 mph SW
Humidity67%
Visibility6.2 mi
Dew point71°
Tue, 1192° / 72°0.05Light rain
92 °Light rain

Derby, Tuesday, 11 August

Light rain. High 92°, low 72°.

Pressure29.74 inHg
Wind14.7 mph SW
Humidity60%
Visibility6.2 mi
Dew point72°
Wed, 1288° / 71°0.24Rain
88 °Rain

Derby, Wednesday, 12 August

Rain. High 88°, low 71°.

Pressure29.85 inHg
Wind12.1 mph E
Humidity69%
Visibility6.2 mi
Dew point73°
Thu, 1374° / 66°0.86Heavy rain
74 °Heavy rain

Derby, Thursday, 13 August

Heavy rain. High 74°, low 66°.

Pressure29.91 inHg
Wind11.7 mph NE
Humidity91%
Visibility—
Dew point68°
Fri, 1477° / 59°0Overcast
77 °Overcast

Derby, Friday, 14 August

Overcast. High 77°, low 59°.

Pressure30.18 inHg
Wind7.2 mph SE
Humidity57%
Visibility—
Dew point57°
Sat, 1578° / 58°0Overcast
78 °Overcast

Derby, Saturday, 15 August

Overcast. High 78°, low 58°.

Pressure30.21 inHg
Wind12.8 mph SE
Humidity60%
Visibility—
Dew point58°
Sun, 1682° / 63°0.04Light rain
82 °Light rain

Derby, Sunday, 16 August

Light rain. High 82°, low 63°.

Pressure30.06 inHg
Wind10.9 mph SE
Humidity88%
Visibility—
Dew point69°
Mon, 1788° / 68°0Light rain
88 °Light rain

Derby, Monday, 17 August

Light rain. High 88°, low 68°.

Pressure29.94 inHg
Wind8.1 mph NE
Humidity67%
Visibility—
Dew point71°
Tue, 1886° / 70°0.06Light rain
86 °Light rain

Derby, Tuesday, 18 August

Light rain. High 86°, low 70°.

Pressure30.00 inHg
Wind7.3 mph SW
Humidity70%
Visibility—
Dew point71°
Wed, 1989° / 69°0.05Light rain
89 °Light rain

Derby, Wednesday, 19 August

Light rain. High 89°, low 69°.

Pressure29.88 inHg
Wind15.5 mph NE
Humidity60%
Visibility—
Dew point69°
Thu, 2081° / 65°0.02Light rain
81 °Light rain

Derby, Thursday, 20 August

Light rain. High 81°, low 65°.

Pressure29.94 inHg
Wind11.4 mph NE
Humidity63%
Visibility—
Dew point63°
Fri, 2183° / 62°0Mostly clear
83 °Mostly clear

Derby, Friday, 21 August

Mostly clear. High 83°, low 62°.

Pressure29.97 inHg
Wind6.3 mph E
Humidity56%
Visibility—
Dew point60°
Sat, 2285° / 64°0.09Light rain
85 °Light rain

Derby, Saturday, 22 August

Light rain. High 85°, low 64°.

Pressure29.91 inHg
Wind15.7 mph NE
Humidity57%
Visibility—
Dew point64°
Sun, 2373° / 56°0Overcast
73 °Overcast

Derby, Sunday, 23 August

Overcast. High 73°, low 56°.

Pressure30.18 inHg
Wind12.7 mph E
Humidity51%
Visibility—
Dew point48°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Derby, IA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Derby, IA since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.