The best times to visit Sandwich for ideal weather are

May 14th to September 30th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

 

 


Other Sandwich Travel Info

Weather in Sandwich

Temperature

Average temperatures in Sandwich vary an incredible amount. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 28th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Sandwich, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 85.5°F (29.7°C) with temperatures rarely dropping below 63°F (17.2°C) at night.

Sandwich Temperatures (Fahrenheit)

Key
High
Average
Low

Sandwich Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Sandwich Perceived Temperature (F)

Key
High
Average
Low

Sandwich Perceived Temperature (C)

Key
High
Average
Low

 

Average Sandwich Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 30.3 21.3 12.3
Feb 30.9 21.9 13.6
Mar 48.5 37.6 28.6
Apr 61.8 48.9 37.8
May 74.3 61.3 49.3
Jun 81.9 70 58.8
Jul 84.2 72.7 61.3
Aug 82.4 70.7 59.4
Sep 76.7 63.6 51.7
Oct 64.1 51.9 40.9
Nov 49.8 39.1 29.6
Dec 36.4 28.2 20.5

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -0.9 -5.9 -10.9
Feb -0.6 -5.6 -10.2
Mar 9.2 3.1 -1.9
Apr 16.6 9.4 3.2
May 23.5 16.3 9.6
Jun 27.7 21.1 14.9
Jul 29 22.6 16.3
Aug 28 21.5 15.2
Sep 24.8 17.6 10.9
Oct 17.8 11.1 4.9
Nov 9.9 3.9 -1.3
Dec 2.4 -2.1 -6.4

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Sandwich are January, November, and then February. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid January. For example, on the week of January 15th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late April with an average of 3 days of significant precipitation the week of April 23rd.

When can you find snow in Sandwich? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Sandwich.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Sandwich (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 10% 0 1.3
Feb 14% 0 1.5
Mar 18% 0 2
Apr 26% 0 4
May 24% 0 3.9
Jun 32% 0 4.8
Jul 23% 0 4.3
Aug 23% 0 4.5
Sep 15% 0 2.7
Oct 20% 0 2.8
Nov 14% 0 2.1
Dec 19% 0 2.4

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 10 0 3.3
Feb 14 0 3.8
Mar 18 0 5.1
Apr 26 0 10.2
May 24 0 9.9
Jun 32 0 12.2
Jul 23 0 10.9
Aug 23 0 11.4
Sep 15 0 6.9
Oct 20 0 7.1
Nov 14 0 5.3
Dec 19 0 6.1

 

Humidity and Wind

Sandwich has some very humid months, with other comfortably humid months. The least humid month is May (54.5% relative humidity), and the most humid month is December (73.9%).

Wind in Sandwich is usually moderate. The windiest month is April, followed by January and February. April’s average wind speed of around 9.9 knots (11.4 MPH or 18.4 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early April where average top sustained speeds reach 18 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Sandwich.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 9.5 Gentle breeze 16.6 Significant breeze
Feb 9.4 Gentle breeze 16.3 Significant breeze
Mar 8.9 Gentle breeze 15.8 Significant breeze
Apr 9.9 Gentle breeze 17.8 Strong breeze
May 8.6 Gentle breeze 16.5 Significant breeze
Jun 7.1 Gentle breeze 15.5 Significant breeze
Jul 5.3 Light breeze 12.6 Significant breeze
Aug 4.7 Light breeze 11.3 Significant breeze
Sep 5.5 Light breeze 11.7 Significant breeze
Oct 7.3 Gentle breeze 14.4 Significant breeze
Nov 8.5 Gentle breeze 15.2 Significant breeze
Dec 8.8 Gentle breeze 15.5 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 68.6%
Feb 67.9%
Mar 61.5%
Apr 54.9%
May 54.5%
Jun 60.7%
Jul 63.6%
Aug 67.9%
Sep 64%
Oct 61.6%
Nov 64.5%
Dec 73.9%

 

Is it Safe to Travel to Sandwich?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Sandwich, IL, US is July, followed by June and August. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Sandwich in November. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is somewhat extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 38.7 in November means 38.7% of the tourists vs. July.

 

 

Overall Sandwich Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 78.6°F (25.9°C) and 34.2°F (1.2°C) with far warmer temperatures in the later months. Rain is somewhat common with 6 to 8 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the most precipitation with 7 to 10 days of precipitation per month. June – August is the busiest season for tourism in Sandwich, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 79.8°F (26.6°C) and 42.3°F (5.7°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 4 to 6 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in Sandwich to be enjoyable for warm weather travelers. The average high during this season is between 36.6°F (2.6°C) and 28°F (-2.2°C). On average, it rains or snows a fair amount: 3 to 6 times per month. These times of year are fairly slow with tourists.

 

Best Times to Travel› the United States › Sandwich, IL, US