Lodi climate

Lodi Frost Dates and Growing Season

NOAA 1991-2020 normals for Lodi, 1 km from Lodi, elevation 824 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Lodi. A median date has an even chance of a later freeze in spring, or an earlier one in fall.

The last spring freeze typically comes around May 1 and the first fall freeze around October 10, a growing season of about 162 days.

Median at 36°F
last May 12, first September 30
Median at 32°F
last May 1, first October 10
Median at 28°F
last April 19, first October 22

Last freeze in spring

The chance of a later freeze than the date shown. At 10 percent, one spring in ten still freezes after the date; planting after the 10 percent date for 32°F is the cautious choice.

Threshold10%20%30%40%50%60%70%80%90%
36°FMay 27May 22May 18May 15May 12May 8May 5May 3Apr 28
32°FMay 15May 10May 6May 3May 1Apr 28Apr 25Apr 21Apr 17
28°FMay 4Apr 30Apr 26Apr 22Apr 19Apr 16Apr 13Apr 10Apr 4
24°FApr 23Apr 18Apr 14Apr 10Apr 7Apr 5Apr 2Mar 30Mar 24
20°FApr 13Apr 7Apr 4Apr 2Mar 31Mar 26Mar 23Mar 20Mar 15
16°FApr 4Mar 31Mar 26Mar 23Mar 20Mar 18Mar 14Mar 11Mar 7

First freeze in fall

The chance of an earlier freeze than the date shown. At 10 percent, one fall in ten freezes before the date.

Threshold10%20%30%40%50%60%70%80%90%
36°FSep 18Sep 22Sep 25Sep 28Sep 30Oct 3Oct 5Oct 8Oct 13
32°FSep 27Oct 1Oct 4Oct 7Oct 10Oct 12Oct 15Oct 19Oct 25
28°FOct 7Oct 12Oct 16Oct 20Oct 22Oct 25Oct 28Oct 31Nov 4
24°FOct 19Oct 25Oct 28Oct 31Nov 2Nov 5Nov 8Nov 12Nov 16
20°FNov 1Nov 4Nov 7Nov 11Nov 13Nov 16Nov 19Nov 23Nov 28
16°FNov 7Nov 12Nov 16Nov 19Nov 22Nov 25Nov 28Dec 1Dec 7

Growing season length

Days between the last spring and first fall freeze at each threshold, with the chance of a season at least that long.

Threshold10%20%30%40%50%60%70%80%90%
36°F159153148144140136132129122
32°F182175171166162158154148142
28°F205197192188184180175171164
24°F228221216212207203198192185
20°F250242238233228224220214208
16°F266259255251246242238233225

How often it gets that cold

The share of years with at least one night at or below each temperature.

36°F or colder
100% of years
32°F or colder
100% of years
28°F or colder
100% of years
24°F or colder
100% of years
20°F or colder
100% of years
16°F or colder
100% of years

Degree days

A degree day is one degree of the daily mean temperature beyond a base, for one day. Heating degree days count cold (the fuel a house burns), cooling degree days heat, growing degree days the warmth a crop needs; each crop has its own base.

Heating degree days, base 65°F
7,137
Cooling degree days, base 65°F
661
Growing degree days, base 40°F
4,760
Growing degree days, base 45°F
3,691
Growing degree days, base 50°F
2,749
Growing degree days, base 55°F
1,932
Growing degree days, base 60°F
1,230

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,44100
February1,19300
March961115
April565163
May23040294
June32146564
July7234691
August17173621
September14760371
October4707116
November842013
December1,23200

What this means

NOAA computes these from the daily lows at the station over 1991-2020, fitting the dates of each year's last and first freeze to a distribution, so a date can be stated at any level of risk. 36°F is a frost risk for tender plants on a clear, calm night, since the ground cools below the air above it; 32°F is a freeze; 28°F is a hard freeze that kills most annuals.

The station is 1 km from Lodi. Low ground, valleys and open fields freeze earlier and later than a town center or a hillside.

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Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal normals for station USC00474790 (Lodi). Public domain.