Frost Dates for Chester, MT

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 24
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. September 17
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 29
First Fall Frost September 11

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 11
First Fall Hard Freeze September 26
48.51°N, -110.97°W © OpenStreetMap

Growing Season

116 Days May 24 to September 17

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 3b

Learn more

Temperature

0° 30° 60° 90°
16°
High: 29°
Avg: 16°
Low: 3°
Jan
20°
High: 33°
Avg: 20°
Low: 6°
Feb
30°
High: 44°
Avg: 30°
Low: 17°
Mar
42°
High: 56°
Avg: 42°
Low: 28°
Apr
52°
High: 66°
Avg: 52°
Low: 38°
May
60°
High: 73°
Avg: 60°
Low: 46°
Jun
67°
High: 83°
Avg: 67°
Low: 52°
Jul
66°
High: 82°
Avg: 66°
Low: 50°
Aug
56°
High: 71°
Avg: 56°
Low: 41°
Sep
42°
High: 57°
Avg: 42°
Low: 27°
Oct
28°
High: 41°
Avg: 28°
Low: 15°
Nov
19°
High: 32°
Avg: 19°
Low: 6°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 3" 3.3"
2.2"
2.17"
Jan
1.5"
1.50"
Feb
1.9"
1.93"
Mar
2.5"
2.47"
Apr
3.1"
3.11"
May
3.2"
3.22"
Jun
3.1"
3.10"
Jul
3.3"
3.29"
Aug
3.1"
3.09"
Sep
2.5"
2.53"
Oct
1.8"
1.79"
Nov
2.0"
2.04"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h16h16h14h12h11h9h8h
Jan: 7:44 AM – 4:16 PM · 8h 31m
Feb: 7:02 AM – 4:58 PM · 9h 56m
Mar: 6:13 AM – 5:47 PM · 11h 34m
Apr: 5:17 AM – 6:43 PM · 13h 26m
May: 4:29 AM – 7:31 PM · 15h 01m
Jun: 4:03 AM – 7:57 PM · 15h 53m
Jul: 4:14 AM – 7:46 PM · 15h 32m
Aug: 4:56 AM – 7:04 PM · 14h 09m
Sep: 5:50 AM – 6:10 PM · 12h 20m
Oct: 6:44 AM – 5:16 PM · 10h 32m
Nov: 7:32 AM – 4:28 PM · 8h 55m
Dec: 7:57 AM – 4:03 PM · 8h 06m
Daylight Longest: 15h 55m · Shortest: 8h 05m

Nearby Stations

Joplin, MTMay 21 - September 19 Tiber Dam, MT May 16 - September 23 Rudyard 19s, MT May 23 - September 19 Dunkirk 19nne, MT May 23 - September 14 Rudyard 21 N, MT May 30 - September 11 Gildford, MTMay 24 - September 15

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