10-day forecast for Saint Johnstown, DE: 57° to 91°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
91°
Best day: Monday, August 10
73°
Worst day: Friday, August 14
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1091° / 76°0
Morning79°feels 79°
Afternoon90°feels 91°
Evening83°feels 86°
Overnight78°feels 79°
91 °
Saint Johnstown, Monday, 10 August
Clear. High 91°, low 76°.
Pressure30.00 inHg
Wind3.3 mph W
Humidity50%
Visibility6.2 mi
Dew point69°
Tue, 1187° / 73°0
Morning74°feels 75°
Afternoon86°feels 88°
Evening79°feels 79°
Overnight80°feels 80°
87 °
Saint Johnstown, Tuesday, 11 August
Overcast. High 87°, low 73°.
Pressure29.91 inHg
Wind10.5 mph W
Humidity57%
Visibility6.2 mi
Dew point67°
Wed, 1285° / 72°0.1
Morning73°feels 74°
Afternoon84°feels 88°
Evening77°feels 78°
Overnight73°feels 73°
85 °
Saint Johnstown, Wednesday, 12 August
Rain. High 85°, low 72°.
Pressure29.83 inHg
Wind6.7 mph W
Humidity64%
Visibility6.2 mi
Dew point69°
Thu, 1387° / 71°0.01
Morning76°feels 78°
Afternoon85°feels 87°
Evening74°feels 74°
Overnight71°feels 72°
87 °
Saint Johnstown, Thursday, 13 August
Light rain. High 87°, low 71°.
Pressure29.83 inHg
Wind12.5 mph W
Humidity59%
Visibility6.2 mi
Dew point69°
Fri, 1473° / 61°0.03
Morning67°feels 67°
Afternoon67°feels 66°
Evening63°feels 63°
Overnight62°feels 62°
73 °
Saint Johnstown, Friday, 14 August
Light rain. High 73°, low 61°.
Pressure30.06 inHg
Wind7.3 mph NW
Humidity65%
Visibility—
Dew point55°
Sat, 1575° / 57°0
Morning65°feels 64°
Afternoon74°feels 73°
Evening66°feels 65°
Overnight62°feels 60°
75 °
Saint Johnstown, Saturday, 15 August
Overcast. High 75°, low 57°.
Pressure30.18 inHg
Wind12.5 mph NW
Humidity42%
Visibility—
Dew point49°
Sun, 1680° / 58°0
Morning67°feels 67°
Afternoon78°feels 78°
Evening68°feels 68°
Overnight68°feels 67°
80 °
Saint Johnstown, Sunday, 16 August
Overcast. High 80°, low 58°.
Pressure30.15 inHg
Wind8.1 mph S
Humidity40%
Visibility—
Dew point51°
Mon, 1779° / 66°0.05
Morning70°feels 71°
Afternoon72°feels 73°
Evening70°feels 70°
Overnight66°feels 67°
79 °
Saint Johnstown, Monday, 17 August
Light rain. High 79°, low 66°.
Pressure29.91 inHg
Wind13 mph S
Humidity94%
Visibility—
Dew point70°
Tue, 1882° / 61°0
Morning71°feels 70°
Afternoon80°feels 80°
Evening70°feels 70°
Overnight66°feels 66°
82 °
Saint Johnstown, Tuesday, 18 August
Mostly clear. High 82°, low 61°.
Pressure29.97 inHg
Wind7.3 mph SE
Humidity40%
Visibility—
Dew point53°
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 Saint Johnstown, DE 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.