Monticello weather by month
What a typical year looks like in Monticello, Utah: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Monticello No. 2, 1 km from Monticello; records cover 2011–2026.
The year at a glance
- Precipitation a year
- 15.7 in399 mm
- Snow a year
- Rare
- Last spring freeze
- May 17
- First fall freeze
- Oct 4
- Heating degree days
- 6,766
- Cooling degree days
- 339
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 2°−16° (heating, 99%) and 91°33° (cooling, 1%).
Month by month
Monticello in January
Highs average 37°3° and lows 17°−8°, with 1.1 in29 mm of precipitation in a typical January.
- Record high
- 57°14° (2015)
- Record low
- −4°−20° (2013)
- Heating degree days
- 1178
- Cooling degree days
- 0
Monticello in February
Highs average 41°5° and lows 20°−7°, with 1.5 in38 mm of precipitation in a typical February.
- Record high
- 60°16° (2025)
- Record low
- −5°−21° (2019)
- Heating degree days
- 970
- Cooling degree days
- 0
Monticello in March
Highs average 50°10° and lows 26°−3°, with 1.3 in33 mm of precipitation in a typical March.
- Record high
- 79°26° (2026)
- Record low
- 6°−14° (2023)
- Heating degree days
- 831
- Cooling degree days
- 0
Monticello in April
Highs average 58°14° and lows 31°0°, with 1.1 in28 mm of precipitation in a typical April.
- Record high
- 79°26° (2012)
- Record low
- 10°−12° (2023)
- Heating degree days
- 614
- Cooling degree days
- 0
Monticello in May
Highs average 67°19° and lows 39°4°, with 0.89 in23 mm of precipitation in a typical May.
- Record high
- 84°29° (2018)
- Record low
- 23°−5° (2024)
- Heating degree days
- 370
- Cooling degree days
- 4
Monticello in June
Highs average 79°26° and lows 48°9°, with 0.5 in13 mm of precipitation in a typical June.
- Record high
- 95°35° (2013)
- Record low
- 31°−1° (2020)
- Heating degree days
- 95
- Cooling degree days
- 56
Monticello in July
Highs average 84°29° and lows 55°13°, with 1.6 in41 mm of precipitation in a typical July.
- Record high
- 97°36° (2021)
- Record low
- 40°4° (2020)
- Heating degree days
- 12
- Cooling degree days
- 160
Monticello in August
Highs average 81°27° and lows 54°12°, with 1.9 in49 mm of precipitation in a typical August.
- Record high
- 95°35° (2026)
- Record low
- 39°4° (2021)
- Heating degree days
- 26
- Cooling degree days
- 102
Monticello in September
Highs average 74°23° and lows 46°8°, with 1.7 in42 mm of precipitation in a typical September.
- Record high
- 93°34° (2022)
- Record low
- 29°−2° (2020)
- Heating degree days
- 170
- Cooling degree days
- 17
Monticello in OctoberThis month
Highs average 62°16° and lows 36°2°, with 1.5 in38 mm of precipitation in a typical October.
- Record high
- 82°28° (2024)
- Record low
- 4°−16° (2019)
- Heating degree days
- 504
- Cooling degree days
- 0
Monticello in November
Highs average 48°9° and lows 26°−3°, with 1.2 in30 mm of precipitation in a typical November.
- Record high
- 69°21° (2020)
- Record low
- 6°−14° (2015)
- Heating degree days
- 838
- Cooling degree days
- 0
Monticello in December
Highs average 38°3° and lows 17°−8°, with 1.4 in35 mm of precipitation in a typical December.
- Record high
- 61°16° (2021)
- Record low
- −6°−21° (2013)
- Heating degree days
- 1158
- Cooling degree days
- 0