Frost Dates for Rancho Penasquitos, CA

Based on data from Rancho Bernardo weather station, 5 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. January 5
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. January 2

This location has a nearly year-round growing season with a brief frost risk period in winter.

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 January 15
First Fall Frost December 28
32.96°N, -117.12°W © OpenStreetMap

Growing Season

363 Days January 5 to January 2

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: 25 to 30°F (−4 to −1°C)

Learn more

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

BSh Hot Semi-Arid (Steppe)

Hot with low but not negligible rainfall. Less extreme than true desert. Dryland farming techniques and drought-tolerant varieties work well. Mulching and water conservation are key.

Köppen climate map

Temperature

40° 60° 80°
57°
High: 67°F
Avg: 57°F
Low: 46°F
Jan
56°
High: 67°F
Avg: 56°F
Low: 46°F
Feb
58°
High: 68°F
Avg: 58°F
Low: 49°F
Mar
61°
High: 70°F
Avg: 61°F
Low: 51°F
Apr
64°
High: 72°F
Avg: 64°F
Low: 55°F
May
67°
High: 76°F
Avg: 67°F
Low: 58°F
Jun
72°
High: 82°F
Avg: 72°F
Low: 63°F
Jul
73°
High: 83°F
Avg: 73°F
Low: 64°F
Aug
71°
High: 81°F
Avg: 71°F
Low: 60°F
Sep
67°
High: 78°F
Avg: 67°F
Low: 57°F
Oct
61°
High: 71°F
Avg: 61°F
Low: 50°F
Nov
55°
High: 66°F
Avg: 55°F
Low: 44°F
Dec
Avg High Avg Temp Avg Low

Precipitation

0" 2" 4" 6" 6.9"
6.9"
6.93"
Jan
6.7"
6.71"
Feb
6.3"
6.27"
Mar
3.3"
3.33"
Apr
0.6"
0.60"
May
0.0"
0.00"
Jun
0.0"
0.00"
Jul
0.0"
0.00"
Aug
0.0"
0.00"
Sep
0.1"
0.15"
Oct
4.9"
4.94"
Nov
5.5"
5.48"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec10h11h12h13h13.5h14h14h13h12h11h10.5h10h
Jan: 6:59 AM – 5:01 PM · 10h 03m
Feb: 6:35 AM – 5:25 PM · 10h 49m
Mar: 6:07 AM – 5:53 PM · 11h 45m
Apr: 5:35 AM – 6:25 PM · 12h 49m
May: 5:09 AM – 6:51 PM · 13h 42m
Jun: 4:55 AM – 7:05 PM · 14h 10m
Jul: 5:01 AM – 6:59 PM · 13h 59m
Aug: 5:23 AM – 6:37 PM · 13h 13m
Sep: 5:54 AM – 6:06 PM · 12h 12m
Oct: 6:25 AM – 5:35 PM · 11h 10m
Nov: 6:52 AM – 5:08 PM · 10h 16m
Dec: 7:05 AM – 4:55 PM · 9h 50m
Daylight Longest: 14h 11m · Shortest: 9h 49m

Nearby Stations

Escondido #2, CA January 2 - December 30 San Pasqual Animal Pk, CA February 2 - December 7 Ramona AP, CA March 19 - November 23 Ramona Fire Dept, CA March 4 - December 4 San Diego Miramar Nas, CA Carlsbad Palomar AP, CA

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