WILMETTE (CGS) - Weather History and Averages

Station: WILMETTE (CGS) (1987 to 1991)
Country: US
State: IL
Latitude: 42.067
Longitude: -87.683

High Temperatures

On average, the day with the warmest high temperature in WILMETTE (CGS) is July 9 at an average of 86.4 °F (30.2 °C).

On average, the day with the coldest high temperature in WILMETTE (CGS) is December 17 at an average of 26.1 °F (-3.3 °C).

Records

The warmest recorded high temperature in WILMETTE (CGS) was 102.9 °F (39.4 °C) on June 25 in the year 1988 at WILMETTE (CGS) — Integrated Surface Dataset (ISD) station ID: 722417 .

The coldest recorded high temperature in WILMETTE (CGS) was 2.1 °F (-16.6 °C) on January 6 in the year 1988 at WILMETTE (CGS) — Integrated Surface Dataset (ISD) station ID: 722417 .

Low Temperatures

On average, the day with the warmest low temperature in WILMETTE (CGS) is August 3 at an average of 72.4 °F (22.5 °C).

On average, the day with the coldest low temperature in WILMETTE (CGS) is February 24 at an average of 14.9 °F (-9.5 °C).

Records

The warmest recorded low temperature in WILMETTE (CGS) was 83.8 °F (28.8 °C) on June 25 in the year 1988 at WILMETTE (CGS) — Integrated Surface Dataset (ISD) station ID: 722417 .

The coldest recorded low temperature in WILMETTE (CGS) was -11.9 °F (-24.4 °C) on December 22 in the year 1989 at WILMETTE (CGS) — Integrated Surface Dataset (ISD) station ID: 722417 .

When you are gardening in WILMETTE (CGS), consider the chance that the weather may freeze and harm your plants. There is a greater than 5% chance of temperatures dropping below freezing in 200 of 366 days per year in WILMETTE (CGS).

According to the USA National Weather Service:

Freeze occurs when the temperature drops to 32° Fahrenheit or lower. A freeze will result in significant damage to many unprotected plants, especially if the temperature remains at-or-below freezing for several hours.

Last freeze

In WILMETTE (CGS) during the spring season, the average last freeze date is no freezing temperatures all season. Expect^* the last freeze date after

April 25 in one of every two years (50%),
May 9 in one of every ten years (10%),
May 11 in one of every twenty years (5%),
May 30 in one of every hundred years (1%).

First freeze

In WILMETTE (CGS) during the autumn (fall) season, the average first freeze date is no freezing temperatures all season. Expect^* the first freeze date before

October 11 in one of every two years (50%),
October 2 in one of every ten years (10%),
September 30 in one of every twenty years (5%),
September 23 in one of every hundred years (1%).

Hard Freeze

According to the USA National Weather Service:

Hard freeze typically occurs when the temperature reaches 28° Fahrenheit or lower for at least an hour (or more). This usually means that most seasonal vegetation will be destroyed. In addition, there is a possibility of damage to unprotected outdoor plumbing/un-drained sprinkler systems etc.

Last hard freeze

In WILMETTE (CGS) during the spring season, the average last hard freeze date is no freezing temperatures all season. Expect^* the last hard freeze date after

April 12 in one of every two years (50%),
May 6 in one of every ten years (10%),
May 8 in one of every twenty years (5%),
May 29 in one of every hundred years (1%).

First hard freeze

In WILMETTE (CGS) during the autumn (fall) season, the average first hard freeze date is no freezing temperatures all season. Expect^* the first hard freeze date before

October 20 in one of every two years (50%),
October 6 in one of every ten years (10%),
October 4 in one of every twenty years (5%),
September 29 in one of every hundred years (1%).

Frost

Frost can happen at temperatures above freezing and damage delicate plants. According to the USA National Weather Service:

Frost occurs when there is a solid deposition of water vapor from the air. Frost will form when solid surfaces are cooled below the dew point. An air temperature range of 33°- 36° Fahrenheit (or colder), along with light winds, is usually needed to initiate frost formation. At least minor damage is possible to plants. One must keep in mind that frost is not guaranteed if the air is very dry and/or winds are roughly 8+ MPH.

Last frost

In WILMETTE (CGS) during the spring season, the average last frost date is no freezing temperatures all season. Expect^* the last frost date after

May 6 in one of every two years (50%),
May 28 in one of every ten years (10%),
May 30 in one of every twenty years (5%),
June 9 in one of every hundred years (1%).

First frost

In WILMETTE (CGS) during the autumn (fall) season, the average frost date is no frost all season. Expect^* the first frost date before

October 5 in one of every two years (50%),
September 24 in one of every ten years (10%),
September 23 in one of every twenty years (5%),
September 19 in one of every hundred years (1%).

Details

If you would like to see the temperatures for specific days, you can click on the corresponding links below:

January
1	2	3	4	5	6	7
8	9	10	11	12	13	14
15	16	17	18	19	20	21
22	23	24	25	26	27	28
29	30	31

February
1	2	3	4	5	6	7
8	9	10	11	12	13	14
15	16	17	18	19	20	21
22	23	24	25	26	27	28
29

March
1	2	3	4	5	6	7
8	9	10	11	12	13	14
15	16	17	18	19	20	21
22	23	24	25	26	27	28
29	30	31

April
1	2	3	4	5	6	7
8	9	10	11	12	13	14
15	16	17	18	19	20	21
22	23	24	25	26	27	28
29	30

May
1	2	3	4	5	6	7
8	9	10	11	12	13	14
15	16	17	18	19	20	21
22	23	24	25	26	27	28
29	30	31

June
1	2	3	4	5	6	7
8	9	10	11	12	13	14
15	16	17	18	19	20	21
22	23	24	25	26	27	28
29	30

July
1	2	3	4	5	6	7
8	9	10	11	12	13	14
15	16	17	18	19	20	21
22	23	24	25	26	27	28
29	30	31

August
1	2	3	4	5	6	7
8	9	10	11	12	13	14
15	16	17	18	19	20	21
22	23	24	25	26	27	28
29	30	31

September
1	2	3	4	5	6	7
8	9	10	11	12	13	14
15	16	17	18	19	20	21
22	23	24	25	26	27	28
29	30

October
1	2	3	4	5	6	7
8	9	10	11	12	13	14
15	16	17	18	19	20	21
22	23	24	25	26	27	28
29	30	31

November
1	2	3	4	5	6	7
8	9	10	11	12	13	14
15	16	17	18	19	20	21
22	23	24	25	26	27	28
29	30

December
1	2	3	4	5	6	7
8	9	10	11	12	13	14
15	16	17	18	19	20	21
22	23	24	25	26	27	28
29	30	31