Photo: Royalbroil · CC BY-SA 3.0Few U.S. towns have cooler summers than Ellison Bay
In January the night’s low is typically 13°. The wettest month is October; the driest is February. Winter nights are cold: in January they are colder than in 90% of U.S. towns. Comfortable outdoor weather lasts from June to September, with highs of 68–76°.
A year in Ellison Bay at a glance
Each month’s typical high and low, and what it brings.
What stands out about Ellison Bay’s climate
Compared with towns across the U.S., with Ellison Bay’s place in Wisconsin beside it.
What a year in Ellison Bay feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 155 frost-free days a year
In half of years the last 32° night comes by May 14 and the first by October 18. Frost and day counts come from NOAA’s station at Ephraim 1ne-wwtp, WI, 7 miles from the town’s center, 100 ft higher.
The 2023 USDA map puts Ellison Bay’s center in zone 5b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −10°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 59 inches of snow a winter
Snow, measured at Washington Is, WI, falls mostly in January. Precipitation (rain plus melted snow) adds up to 32 inches a year; October is the wettest month and February the driest. Rain or snow falls on about 116 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Ellison Bay
96% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Ephraim 1ne-wwtp, WI.
Living with Ellison Bay’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
155 frost-free days in zone 5b. The last frost comes by May 14 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 18.
Months with highs of 62–84° and lows of 40° or more: June, July, August and September. 0.2 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Ellison Bay from natural hazards, river flooding is the largest share (53%); heat waves, cold waves, winter storms and ice storms together are 34%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Ellison Bay and similar climates
TownRatings has no climate map of the towns around Ellison Bay yet.
Climates most like Ellison Bay’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Ellison Bay, WI | 13° | 76° | 32" | 59" |
| Alpena, MI | 14° | 78° | 31" | 59" |
| Duluth, MN | 5° | 76° | 30" | 56" |
| Plattsburgh, NY | 9° | 80° | 34" | 50" |
| Milton, VT | 10° | 80° | 40" | 50" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Ellison Bay averaged 1.6° warmer than the 1900s. The biggest change is in February (+2.8°).
A bigger shift than in 63% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Ellison Bay compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Ellison Bay’s place among Wisconsin’s.
Ellison Bay weather by month
Highs, lows and precipitation from NOAA’s grid at Ellison Bay’s center; snow, wet days and snow on the ground from Washington Is, WI. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 26° | 13° | 1.7" | 15.0" | 10 | 26 | 8° – 29° |
| February | 28° | 14° | 1.2" | 13.0" | 8 | 26 | 9° – 31° |
| March | 37° | 22° | 1.8" | 9.5" | 8 | 18 | 19° – 41° |
| April | 48° | 31° | 2.9" | 5.7" | 10 | 4 | 33° – 46° |
| May | 61° | 41° | 3.1" | 0.0" | 11 | 0 | 46° – 58° |
| June | 71° | 52° | 3.3" | 0.0" | 10 | 0 | 59° – 66° |
| July | 76° | 58° | 3.3" | 0.0" | 10 | 0 | 61° – 72° |
| August | 76° | 58° | 3.0" | 0.0" | 9 | 0 | 62° – 71° |
| September | 68° | 51° | 3.4" | 0.0" | 10 | 0 | 54° – 64° |
| October | 55° | 40° | 3.4" | 0.2" | 12 | 0 | 43° – 54° |
| November | 42° | 30° | 2.4" | 3.4" | 9 | 3 | 28° – 43° |
| December | 32° | 20° | 2.0" | 12.0" | 10 | 17 | 17° – 35° |
| Year | 52° | 36° | 31.5" | 58.8" | 116 | 92 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 9° to 31°. June is the most reliable, staying within 8°.
Where Ellison Bay’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Ellison Bay’s center.
- Snow: Washington Is, WI.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Ephraim 1ne-wwtp, WI, 7 miles from the town’s center, 100 ft higher; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Ellison Bay’s climate
What is the weather like in Ellison Bay?
A typical July afternoon reaches 76°, a January night drops to 13°, and about 59 inches of snow falls in a normal winter. Colder January nights than 90% of U.S. towns; cooler July afternoons than 98% of U.S. towns.
How cold does it get in Ellison Bay in winter?
January nights average 13°. About 155 nights a year reach 32° or below and 16 reach 0° or below. In the coldest January of the last 30 years the month averaged 8°.
How much snow does Ellison Bay get?
About 59 inches in a normal winter at Washington Is, WI, most of it in January, with snow on the ground about 92 days a year.
How hot does it get in Ellison Bay?
July, with a typical high of 76° and a low of 58°. About 1 days a year reach 90° (Ephraim 1ne-wwtp, WI).
When is the first and last frost in Ellison Bay?
In half of years the last spring frost (32°) comes by May 14 and the first fall frost by October 18, about 155 frost-free days, at Ephraim 1ne-wwtp, WI.
What growing zone is Ellison Bay in?
Zone 5b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −10°.
What is the best time of year to visit Ellison Bay?
By one simple rule (highs of 62–84° and lows of 40° or more), June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Ellison Bay getting warmer?
Yes: 1991–2020 averaged 1.6° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 63% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Ellison Bay.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.