10-day forecast for Herndon, IA: 56° to 96°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
96°
Best day: Monday, August 17
82° · 0.3 in
Worst day: Thursday, August 13
Tap any day below to see morning, afternoon, evening and overnight.
Sun, 0992° / 71°0
Morning71°feels 72°
Afternoon91°feels 94°
Evening84°feels 88°
Overnight74°feels 76°
92 °
Herndon, Sunday, 9 August
Light rain. High 92°, low 71°.
Pressure29.77 inHg
Wind11 mph W
Humidity46%
Visibility6.2 mi
Dew point66°
Mon, 1091° / 67°0.03
Morning71°feels 72°
Afternoon89°feels 92°
Evening81°feels 84°
Overnight72°feels 73°
91 °
Herndon, Monday, 10 August
Light rain. High 91°, low 67°.
Pressure29.80 inHg
Wind13.1 mph E
Humidity54%
Visibility6.2 mi
Dew point66°
Tue, 1194° / 70°0
Morning73°feels 73°
Afternoon89°feels 93°
Evening83°feels 88°
Overnight73°feels 72°
94 °
Herndon, Tuesday, 11 August
Light rain. High 94°, low 70°.
Pressure29.74 inHg
Wind8.4 mph NW
Humidity47%
Visibility6.2 mi
Dew point66°
Wed, 1292° / 72°0.08
Morning76°feels 77°
Afternoon91°feels 95°
Evening86°feels 92°
Overnight73°feels 75°
92 °
Herndon, Wednesday, 12 August
Light rain. High 92°, low 72°.
Pressure29.85 inHg
Wind12.5 mph SE
Humidity52%
Visibility6.2 mi
Dew point68°
Thu, 1382° / 64°0.3
Morning70°feels 71°
Afternoon77°feels 77°
Evening74°feels 74°
Overnight64°feels 64°
82 °
Herndon, Thursday, 13 August
Rain. High 82°, low 64°.
Pressure29.94 inHg
Wind14.8 mph NE
Humidity64%
Visibility—
Dew point63°
Fri, 1482° / 56°0
Morning62°feels 61°
Afternoon78°feels 77°
Evening73°feels 73°
Overnight62°feels 61°
82 °
Herndon, Friday, 14 August
Mostly clear. High 82°, low 56°.
Pressure30.18 inHg
Wind7.1 mph SE
Humidity35%
Visibility—
Dew point46°
Sat, 1582° / 58°0
Morning64°feels 63°
Afternoon79°feels 79°
Evening77°feels 77°
Overnight71°feels 71°
82 °
Herndon, Saturday, 15 August
Overcast. High 82°, low 58°.
Pressure30.18 inHg
Wind13.5 mph S
Humidity49%
Visibility—
Dew point56°
Sun, 1684° / 64°0
Morning69°feels 71°
Afternoon84°feels 89°
Evening83°feels 87°
Overnight72°feels 73°
84 °
Herndon, Sunday, 16 August
Overcast. High 84°, low 64°.
Pressure30.00 inHg
Wind10.4 mph SE
Humidity62%
Visibility—
Dew point67°
Mon, 1796° / 70°0
Morning76°feels 78°
Afternoon91°feels 95°
Evening87°feels 88°
Overnight75°feels 76°
96 °
Herndon, Monday, 17 August
Overcast. High 96°, low 70°.
Pressure29.94 inHg
Wind12.3 mph NE
Humidity50%
Visibility—
Dew point67°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Herndon, IA around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.