Frost Dates for Castlegar A, BC

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 1
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 6
First Fall Frost October 2

Hard Freeze (−2°C)

Last Spring Hard Freeze April 15
First Fall Hard Freeze October 21
49.30°N, -117.63°W © OpenStreetMap

Growing Season

159 Days May 1 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 7a

Avg. annual minimum: 0 to 5°F (−18 to −15°C)

Learn more

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

Dsb Warm-Summer Continental (Dry Summer)

Warm, dry summers and cold, snowy winters. Common in mountain regions. Moderate growing season with irrigation needs in summer.

Köppen climate map

Temperature

-5° 5° 15° 25°
-2°
High: 0°C
Avg: -2°C
Low: -4°C
Jan
0°
High: 3°C
Avg: 0°C
Low: -4°C
Feb
4°
High: 9°C
Avg: 4°C
Low: -1°C
Mar
9°
High: 15°C
Avg: 9°C
Low: 2°C
Apr
14°
High: 21°C
Avg: 14°C
Low: 7°C
May
17°
High: 24°C
Avg: 17°C
Low: 10°C
Jun
21°
High: 29°C
Avg: 21°C
Low: 13°C
Jul
21°
High: 29°C
Avg: 21°C
Low: 12°C
Aug
15°
High: 22°C
Avg: 15°C
Low: 8°C
Sep
8°
High: 13°C
Avg: 8°C
Low: 3°C
Oct
2°
High: 5°C
Avg: 2°C
Low: 0°C
Nov
-2°
High: 0°C
Avg: -2°C
Low: -4°C
Dec
0°C
−2°C
Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)

Precipitation

0 mm 30 mm 60 mm 90 mm
79 mm
78.7 mm
Jan
56 mm
55.9 mm
Feb
79 mm
78.7 mm
Mar
58 mm
58.4 mm
Apr
61 mm
61.0 mm
May
79 mm
78.7 mm
Jun
33 mm
33.0 mm
Jul
10 mm
10.2 mm
Aug
33 mm
33.0 mm
Sep
64 mm
63.5 mm
Oct
84 mm
83.8 mm
Nov
89 mm
88.9 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8.5h10h11.5h13.5h15h16h15.5h14h12.5h10.5h9h8h
Jan: 7:48 AM – 4:12 PM · 8h 25m
Feb: 7:04 AM – 4:56 PM · 9h 52m
Mar: 6:13 AM – 5:47 PM · 11h 34m
Apr: 5:16 AM – 6:44 PM · 13h 29m
May: 4:27 AM – 7:33 PM · 15h 06m
Jun: 3:60 AM – 8:00 PM · 16h 01m
Jul: 4:11 AM – 7:49 PM · 15h 38m
Aug: 4:54 AM – 7:06 PM · 14h 13m
Sep: 5:50 AM – 6:10 PM · 12h 21m
Oct: 6:45 AM – 5:15 PM · 10h 29m
Nov: 7:35 AM – 4:25 PM · 8h 50m
Dec: 8:00 AM – 3:60 PM · 7h 59m
Daylight Longest: 16h 02m · Shortest: 7h 58m

Nearby Stations

Castlegar Bchpa Dam, BC April 14 - October 22 Warfield Rcs, BC April 30 - October 12 Nelson Rixen Creek, BC May 8 - October 7 Nelson Cs, BC April 20 - October 18 Boundary Dam, WAMay 4 - October 4 Nelson Ne, BC April 24 - October 18

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