Newcastle weather by month
What a typical year looks like in Newcastle, Utah: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Enterprise, 16 km from Newcastle; records cover 1926–2026.
The year at a glance
- Precipitation a year
- 15.2 in387 mm
- Snow a year
- 25 in64 cm
- Last spring freeze
- May 27
- First fall freeze
- Sep 25
- Heating degree days
- 6,085
- Cooling degree days
- 573
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −4°−20° (heating, 99%) and 97°36° (cooling, 1%).
Month by month
Newcastle in January
Highs average 42°6° and lows 19°−7°, with 1.5 in39 mm of precipitation and 5 in13 cm of snow in a typical January.
- Record high
- 64°18° (2012)
- Record low
- −20°−29° (2007)
- Heating degree days
- 1074
- Cooling degree days
- 0
Newcastle in February
Highs average 47°8° and lows 20°−7°, with 2 in50 mm of precipitation and 6 in16 cm of snow in a typical February.
- Record high
- 72°22° (2025)
- Record low
- −22°−30° (1929)
- Heating degree days
- 886
- Cooling degree days
- 0
Newcastle in March
Highs average 57°14° and lows 26°−3°, with 1.9 in48 mm of precipitation and 2.5 in6.4 cm of snow in a typical March.
- Record high
- 85°29° (2026)
- Record low
- −2°−19° (2007)
- Heating degree days
- 732
- Cooling degree days
- 0
Newcastle in April
Highs average 64°18° and lows 30°−1°, with 1 in25 mm of precipitation and 1.6 in4.1 cm of snow in a typical April.
- Record high
- 84°29° (2012)
- Record low
- 7°−14° (2023)
- Heating degree days
- 543
- Cooling degree days
- 0
Newcastle in May
Highs average 73°23° and lows 39°4°, with 0.93 in24 mm of precipitation and 0.1 in0.3 cm of snow in a typical May.
- Record high
- 94°34° (2025)
- Record low
- 15°−9° (2008)
- Heating degree days
- 294
- Cooling degree days
- 9
Newcastle in June
Highs average 83°29° and lows 48°9°, with 0.47 in12 mm of precipitation in a typical June.
- Record high
- 102°39° (2013)
- Record low
- 29°−2° (2011)
- Heating degree days
- 68
- Cooling degree days
- 90
Newcastle in July
Highs average 90°32° and lows 56°13°, with 1 in26 mm of precipitation in a typical July.
- Record high
- 103°39° (2024)
- Record low
- 41°5° (1928)
- Heating degree days
- 2
- Cooling degree days
- 245
Newcastle in August
Highs average 87°31° and lows 55°13°, with 1.2 in31 mm of precipitation in a typical August.
- Record high
- 100°38° (2020)
- Record low
- 39°4° (2010)
- Heating degree days
- 6
- Cooling degree days
- 188
Newcastle in September
Highs average 81°27° and lows 45°7°, with 0.95 in24 mm of precipitation in a typical September.
- Record high
- 98°37° (2020)
- Record low
- 25°−4° (1927)
- Heating degree days
- 110
- Cooling degree days
- 41
Newcastle in OctoberThis month
Highs average 67°20° and lows 33°0°, with 1.5 in39 mm of precipitation and 0.6 in1.5 cm of snow in a typical October.
- Record high
- 90°32° (2024)
- Record low
- 3°−16° (2019)
- Heating degree days
- 468
- Cooling degree days
- 0
Newcastle in November
Highs average 54°12° and lows 23°−5°, with 1.1 in28 mm of precipitation and 2.3 in5.8 cm of snow in a typical November.
- Record high
- 76°24° (2009)
- Record low
- −11°−24° (2010)
- Heating degree days
- 800
- Cooling degree days
- 0
Newcastle in December
Highs average 42°6° and lows 17°−8°, with 1.6 in40 mm of precipitation and 6 in16 cm of snow in a typical December.
- Record high
- 67°19° (1979)
- Record low
- −23°−31° (2013)
- Heating degree days
- 1102
- Cooling degree days
- 0