Frost Dates for Monticello, UT

Based on data from Monticello #2 weather station, 1 miles away

Frost Dates

Last Spring Frost (50%) iA 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. May 17
First Fall Frost (50%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. October 7
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly a 30% chance of frost remaining by this date. Use these dates for a safer planting window, especially for tender plants sensitive to cold.

Last Spring Frost May 24
First Fall Frost October 1

Hard Freeze (28°F)

Last Spring Hard Freeze May 2
First Fall Hard Freeze October 17
37.87°N, -109.34°W © OpenStreetMap

Growing Season

143 Days May 17 to October 7

USDA Hardiness Zone iHardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.

Zone 6a

Avg. annual minimum: −10 to −5°F (−23 to −21°C)

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

Dsa Hot-Summer Continental (Dry Summer)

Hot, dry summers and cold, wet winters. A continental version of Mediterranean climate. Summer irrigation is essential; cold-hardy crops grow well in the wet season.

Köppen climate map

Temperature

10° 30° 50° 70° 90°
27°
High: 37°F
Avg: 27°F
Low: 17°F
Jan
30°
High: 41°F
Avg: 30°F
Low: 20°F
Feb
38°
High: 50°F
Avg: 38°F
Low: 26°F
Mar
45°
High: 58°F
Avg: 45°F
Low: 31°F
Apr
53°
High: 67°F
Avg: 53°F
Low: 39°F
May
64°
High: 79°F
Avg: 64°F
Low: 48°F
Jun
70°
High: 84°F
Avg: 70°F
Low: 55°F
Jul
68°
High: 81°F
Avg: 68°F
Low: 54°F
Aug
60°
High: 74°F
Avg: 60°F
Low: 46°F
Sep
49°
High: 62°F
Avg: 49°F
Low: 36°F
Oct
37°
High: 48°F
Avg: 37°F
Low: 26°F
Nov
28°
High: 38°F
Avg: 28°F
Low: 17°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 4.2"
3.3"
3.33"
Jan
3.5"
3.48"
Feb
3.3"
3.33"
Mar
2.9"
2.85"
Apr
3.2"
3.19"
May
2.0"
2.01"
Jun
2.2"
2.19"
Jul
2.8"
2.81"
Aug
3.7"
3.74"
Sep
4.2"
4.23"
Oct
3.4"
3.40"
Nov
3.3"
3.33"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14h14.5h14.5h13.5h12h11h10h9.5h
Jan: 7:10 AM – 4:50 PM · 9h 39m
Feb: 6:42 AM – 5:18 PM · 10h 35m
Mar: 6:09 AM – 5:51 PM · 11h 42m
Apr: 5:30 AM – 6:30 PM · 12h 59m
May: 4:59 AM – 7:01 PM · 14h 03m
Jun: 4:42 AM – 7:18 PM · 14h 37m
Jul: 4:49 AM – 7:11 PM · 14h 23m
Aug: 5:16 AM – 6:44 PM · 13h 28m
Sep: 5:53 AM – 6:07 PM · 12h 14m
Oct: 6:30 AM – 5:30 PM · 10h 60m
Nov: 7:03 AM – 4:57 PM · 9h 55m
Dec: 7:18 AM – 4:42 PM · 9h 23m
Daylight Longest: 14h 38m · Shortest: 9h 22m

Nearby Stations

Monticello 2e, UT May 19 - October 2 Cedar Pt, UTMay 16 - October 11 Northdale, CO June 3 - September 25 Blanding, UTApril 28 - October 21 Dove Creek, COMay 11 - October 12 La Sal 1sw, UTMay 17 - October 6

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