10-day forecast for Newcastle, UT: 64° to 102°, with precipitation expected on 3 days. The table below breaks each day into morning, afternoon, evening and overnight.
102°
Best day: Saturday, August 8
83° · 0.14 in
Worst day: Friday, August 14
Tap any day below to see morning, afternoon, evening and overnight.
Sun, 09100° / 66°0.02
Morning76°feels 75°
Afternoon99°feels 95°
Evening99°feels 97°
Overnight73°feels 72°
100 °
Newcastle, Sunday, 9 August
Light rain. High 100°, low 66°.
Pressure29.88 inHg
Wind12.3 mph SW
Humidity17%
Visibility6.2 mi
Dew point42°
Mon, 1095° / 75°0.02
Morning78°feels 77°
Afternoon94°feels 90°
Evening89°feels 85°
Overnight80°feels 81°
95 °
Newcastle, Monday, 10 August
Light rain. High 95°, low 75°.
Pressure29.91 inHg
Wind17.1 mph SW
Humidity22%
Visibility6.2 mi
Dew point46°
Tue, 1194° / 72°0
Morning76°feels 75°
Afternoon93°feels 90°
Evening82°feels 81°
Overnight80°feels 80°
94 °
Newcastle, Tuesday, 11 August
Overcast. High 94°, low 72°.
Pressure29.94 inHg
Wind13.3 mph SW
Humidity25%
Visibility6.2 mi
Dew point48°
Wed, 1289° / 70°0
Morning75°feels 74°
Afternoon87°feels 84°
Evening84°feels 82°
Overnight70°feels 69°
89 °
Newcastle, Wednesday, 12 August
Overcast. High 89°, low 70°.
Pressure29.88 inHg
Wind9.7 mph SW
Humidity31%
Visibility6.2 mi
Dew point48°
Thu, 1382° / 71°0.08
Morning76°feels 75°
Afternoon82°feels 81°
Evening80°feels 79°
Overnight71°feels 71°
82 °
Newcastle, Thursday, 13 August
Light rain. High 82°, low 71°.
Pressure29.85 inHg
Wind15.5 mph S
Humidity37%
Visibility—
Dew point52°
Fri, 1483° / 64°0.14
Morning69°feels 69°
Afternoon82°feels 81°
Evening81°feels 79°
Overnight73°feels 72°
83 °
Newcastle, Friday, 14 August
Light rain. High 83°, low 64°.
Pressure29.94 inHg
Wind11.7 mph SW
Humidity32%
Visibility—
Dew point47°
Sat, 1587° / 65°0.04
Morning70°feels 69°
Afternoon81°feels 80°
Evening84°feels 82°
Overnight74°feels 73°
87 °
Newcastle, Saturday, 15 August
Light rain. High 87°, low 65°.
Pressure30.06 inHg
Wind14.9 mph SW
Humidity35%
Visibility—
Dew point48°
Sun, 1690° / 69°0
Morning74°feels 72°
Afternoon88°feels 84°
Evening87°feels 84°
Overnight77°feels 76°
90 °
Newcastle, Sunday, 16 August
Partly cloudy. High 90°, low 69°.
Pressure30.03 inHg
Wind15.7 mph SW
Humidity23%
Visibility—
Dew point43°
Mon, 1793° / 70°0
Morning76°feels 74°
Afternoon90°feels 86°
Evening89°feels 86°
Overnight78°feels 77°
93 °
Newcastle, Monday, 17 August
Mostly clear. High 93°, low 70°.
Pressure30.03 inHg
Wind16.2 mph SW
Humidity20%
Visibility—
Dew point41°
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 Newcastle, UT 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.