Frost Dates for VALENTIA OBSERVATORY, Ireland

Elevation: 159 m

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. February 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. December 14
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 March 1
First Fall Frost December 8
51.94°N, -10.22°W © OpenStreetMap

Growing Season

301 Days February 17 to December 14

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 9b

Avg. annual minimum: −4 to −1°C

Learn more

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

Cfb Oceanic (Marine West Coast)

Mild year-round with cool summers and wet winters. Excellent for cool-season crops like brassicas, peas, and root vegetables. Extended harvest seasons but summer heat-loving crops may struggle.

Köppen climate map

Temperature

0° 5° 10° 15° 20°
7°
High: 8°C
Avg: 7°C
Low: 5°C
Jan
7°
High: 8°C
Avg: 7°C
Low: 5°C
Feb
7°
High: 9°C
Avg: 7°C
Low: 5°C
Mar
9°
High: 11°C
Avg: 9°C
Low: 6°C
Apr
11°
High: 13°C
Avg: 11°C
Low: 8°C
May
13°
High: 15°C
Avg: 13°C
Low: 11°C
Jun
14°
High: 16°C
Avg: 14°C
Low: 12°C
Jul
15°
High: 16°C
Avg: 15°C
Low: 13°C
Aug
13°
High: 15°C
Avg: 13°C
Low: 12°C
Sep
11°
High: 13°C
Avg: 11°C
Low: 9°C
Oct
9°
High: 10°C
Avg: 9°C
Low: 7°C
Nov
7°
High: 9°C
Avg: 7°C
Low: 6°C
Dec
Avg High Avg Temp Avg Low

Precipitation

0 mm 50 mm 100 mm 150 mm
147 mm
147.3 mm
Jan
114 mm
114.3 mm
Feb
102 mm
101.6 mm
Mar
99 mm
99.1 mm
Apr
97 mm
96.5 mm
May
89 mm
88.9 mm
Jun
94 mm
94.0 mm
Jul
107 mm
106.7 mm
Aug
104 mm
104.1 mm
Sep
130 mm
129.5 mm
Oct
155 mm
154.9 mm
Nov
157 mm
157.5 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8h9.5h11.5h13.5h15.5h16.5h16h14.5h12.5h10.5h8.5h7.5h
Jan: 7:59 AM – 4:01 PM · 8h 02m
Feb: 7:10 AM – 4:50 PM · 9h 40m
Mar: 6:14 AM – 5:46 PM · 11h 31m
Apr: 5:11 AM – 6:49 PM · 13h 38m
May: 4:17 AM – 7:43 PM · 15h 26m
Jun: 3:46 AM – 8:14 PM · 16h 27m
Jul: 3:59 AM – 8:01 PM · 16h 02m
Aug: 4:47 AM – 7:13 PM · 14h 26m
Sep: 5:49 AM – 6:11 PM · 12h 23m
Oct: 6:50 AM – 5:10 PM · 10h 20m
Nov: 7:45 AM – 4:15 PM · 8h 29m
Dec: 8:14 AM – 3:46 PM · 7h 33m
Daylight Longest: 16h 29m · Shortest: 7h 31m

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