Frost Dates for ILE DE GROIX, France
Frost Dates
Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide.
February 9
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date.
December 15
30% Probability
Only 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
February 19
First Fall Frost
December 8
Growing Season
310 Days
February 9 to December 15
USDA Hardiness Zone
Hardiness 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
Köppen Climate
The 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.
Temperature
5°
10°
15°
20°
25°
Avg High
Avg Temp
Avg Low
Temperature table
| Month | Avg High | Avg Temp | Avg Low |
|---|---|---|---|
| January | 10° | 8° | 6° |
| February | 10° | 8° | 5° |
| March | 12° | 9° | 7° |
| April | 13° | 11° | 8° |
| May | 16° | 13° | 11° |
| June | 19° | 16° | 13° |
| July | 21° | 18° | 15° |
| August | 21° | 18° | 15° |
| September | 19° | 16° | 14° |
| October | 16° | 14° | 12° |
| November | 13° | 11° | 9° |
| December | 10° | 8° | 7° |
Precipitation
0 mm
50 mm
100 mm
Precipitation table
| Month | Precipitation |
|---|---|
| January | 94 |
| February | 76 |
| March | 66 |
| April | 76 |
| May | 61 |
| June | 46 |
| July | 23 |
| August | 48 |
| September | 58 |
| October | 97 |
| November | 99 |
| December | 107 |
Sunrise / Sunset
Daylight
Longest: 15h 47m · Shortest: 8h 13m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:41 AM | 4:19 PM | 8h 38m |
| February | 7:00 AM | 4:60 PM | 9h 60m |
| March | 6:12 AM | 5:48 PM | 11h 35m |
| April | 5:18 AM | 6:42 PM | 13h 24m |
| May | 4:32 AM | 7:28 PM | 14h 55m |
| June | 4:07 AM | 7:53 PM | 15h 46m |
| July | 4:17 AM | 7:43 PM | 15h 25m |
| August | 4:58 AM | 7:02 PM | 14h 05m |
| September | 5:50 AM | 6:10 PM | 12h 19m |
| October | 6:43 AM | 5:17 PM | 10h 34m |
| November | 7:30 AM | 4:30 PM | 9h 01m |
| December | 7:53 AM | 4:07 PM | 8h 14m |
Nearby Stations
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