Ephraim, Wisconsin climate: Normal weather by month, frost dates and records
Ephraim's normal year runs from 12°F January nights to 80°F July afternoons, with 31.0 inches of precipitation and 62 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.1°C, January lows of −11°C, July highs of 26°C, 787 mm of precipitation a year.
- NOAA stationEphraim 1 mi NE-Wastewater Treatment Plant
- Station IDUSC00472626
- Location45.17°N 87.15°W
- Elevation733 ft (223 m)
- From the centerunder 1 mile
- Population340
On October 14, the normal high in Ephraim is 58°F and the normal low 41°F, and the chance of measurable rain or snow is 43%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Ephraim.
- Jan 27° 12°
- Feb 29° 13°
- Mar 39° 21°
- Apr 51° 31°
- May 65° 42°
- Jun 74° 53°
- Jul 80° 58°
- Aug 78° 57°
- Sep 70° 51°
- Oct 57° 41°
- Nov 44° 30°
- Dec 33° 19°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Ephraim each month?
July is the warmest month, with normal highs of 80°F; January the coldest, with normal lows of 12°F. The most precipitation falls in October (3.61 in), the least in February (1.06 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 27°F | 12°F | 19.4°F | 1.71 | 16.8 | 9 | <1 | 30 | 9 h 10 min |
| February | 29°F | 13°F | 21.0°F | 1.06 | 14.1 | 7 | <1 | 27 | 10 h 20 min |
| March | 39°F | 21°F | 29.8°F | 1.66 | 7.9 | 7 | <1 | 26 | 11 h 50 min |
| April | 51°F | 31°F | 41.1°F | 2.71 | 6.4 | 9 | <1 | 18 | 13 h 30 min |
| May | 65°F | 42°F | 53.2°F | 3.46 | 0.0 | 11 | <1 | 3 | 14 h 50 min |
| June | 74°F | 53°F | 63.1°F | 3.31 | 0.0 | 12 | <1 | <1 | 15 h 40 min |
| July | 80°F | 58°F | 68.7°F | 3.05 | 0.0 | 10 | 1 | <1 | 15 h 20 min |
| August | 78°F | 57°F | 67.4°F | 3.03 | 0.0 | 10 | <1 | <1 | 14 h 10 min |
| September | 70°F | 51°F | 60.8°F | 3.41 | 0.0 | 9 | <1 | <1 | 12 h 40 min |
| October | 57°F | 41°F | 48.8°F | 3.61 | 0.1 | 14 | <1 | 4 | 11 h |
| November | 44°F | 30°F | 36.9°F | 2.27 | 2.5 | 9 | <1 | 18 | 9 h 40 min |
| December | 33°F | 19°F | 25.8°F | 1.70 | 13.8 | 10 | <1 | 28 | 8 h 50 min |
| Year (annual) | 54°F | 36°F | 44.7°F | 30.98 | 61.6 | 117 | 1 | 155 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −3°C | −11°C | −7.0°C | 43 mm | 43 cm |
| February | −2°C | −11°C | −6.1°C | 27 mm | 36 cm |
| March | 4°C | −6°C | −1.2°C | 42 mm | 20 cm |
| April | 11°C | 0°C | 5.1°C | 69 mm | 16 cm |
| May | 18°C | 5°C | 11.8°C | 88 mm | 0 cm |
| June | 23°C | 11°C | 17.3°C | 84 mm | 0 cm |
| July | 26°C | 14°C | 20.4°C | 77 mm | 0 cm |
| August | 26°C | 14°C | 19.7°C | 77 mm | 0 cm |
| September | 21°C | 11°C | 16.0°C | 87 mm | 0 cm |
| October | 14°C | 5°C | 9.3°C | 92 mm | 0 cm |
| November | 6°C | −1°C | 2.7°C | 58 mm | 6 cm |
| December | 0°C | −7°C | −3.4°C | 43 mm | 35 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00472626; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Ephraim?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, September has the fewest days with rain (9).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00472626.
When is the last frost in Ephraim?
In Ephraim, the last spring frost (32°F) comes after May 14 in half of years and after May 28 in one year in ten; the first autumn frost comes before October 18 in half of years and before October 1 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 141 year in 10 after May 28; 9 in 10 after April 28
- First autumn frost, half of years before
- October 181 year in 10 before October 1; 9 in 10 before November 3
NOAA puts the median frost-free season at 155 days, and the season without a hard freeze (28°F) at 180 days.
A hard freeze (28°F) comes after May 1 in half of springs and before November 1 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Ephraim in zone 5b in ZIP code 54211.
Frost dates for every NOAA station in Wisconsin · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00472626; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Ephraim?
In a normal year in Ephraim, 1 day a year reaches 90°F, 155 nights fall to 32°F or colder and 117 days bring measurable precipitation.
- Days at 90°F or more
- 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 155a normal year
- Days that stay below freezing
- 71high of 32°F or less
- Days with 0.01 inch of precipitation
- 117a normal year
- Days with 1 inch of snow or more
- 19a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00472626.
How sunny is Ephraim?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Ephraim, 3.6 kWh per square metre a day. July is the sunniest month (80%) and December the cloudiest (54%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 56% | 1.3 |
| February | 62% | 2.2 |
| March | 67% | 3.4 |
| April | 68% | 4.6 |
| May | 71% | 5.6 |
| June | 75% | 6.1 |
| July | 80% | 6.2 |
| August | 78% | 5.2 |
| September | 75% | 4.0 |
| October | 64% | 2.4 |
| November | 58% | 1.4 |
| December | 54% | 1.1 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Ephraim need?
A normal year in Ephraim brings 7,725 heating degree days, 44% more than the median U.S. place (5,373), and 347 cooling degree days, 62% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,108 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,415 | 0 |
| February | 1,233 | 0 |
| March | 1,090 | 0 |
| April | 718 | 0 |
| May | 372 | 6 |
| June | 104 | 49 |
| July | 27 | 142 |
| August | 36 | 112 |
| September | 166 | 38 |
| October | 503 | 1 |
| November | 845 | 0 |
| December | 1,217 | 0 |
| Year (annual) | 7,725 | 347 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00472626. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Ephraim been warmer than normal lately?
2023 averaged 45.0°F, 0.3°F above the 1991-2020 normal of 44.7°F. 2 of the 3 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 46.0°F | +1.3°F | 29.40 | 42.8 |
| 2022 | 42.5°F | −2.2°F | 33.92 | 47.7 |
| 2023 | 45.0°F | +0.3°F | 29.97 | 61.3 |
Source: observed years: ACIS, station USC00472626. A year counts only with all twelve months complete.
How does Ephraim's climate compare?
Ephraim is warmer than 68 of the other 164 places with their own NOAA record in Wisconsin, and wetter than 12. Across the 7,247 U.S. stations with normals, its annual mean of 44.7°F is warmer than 18%.
In the Köppen classification computed from these normals, Ephraim is Dfb: continental, no dry season, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Ephraim share this climate record?
4 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Sister Bay, WI1,170 people · 2 mi NE
- Egg Harbor, WI392 people · 11 mi SW
- Baileys Harbor, WI280 people · 7 mi S
- Ellison Bay, WI188 people · 7 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Ephraim's climate
What is the coldest month in Ephraim?
January, with a normal high of 27°F and a normal low of 12°F. The warmest is July (80°F by day, 58°F at night).
Does it snow in Ephraim?
Yes: 62 inches in a normal year, falling on 26 days with 0.1 inch or more, the most in January (16.8 inches).
What is the rainiest month in Ephraim?
October, with 3.61 in of precipitation in a normal year; the driest is February with 1.06 in.
What plant hardiness zone is Ephraim in?
The USDA's 2023 map puts Ephraim in zone 5b in ZIP code 54211.
How late can frost come in Ephraim?
In half of years the last 32°F night comes after May 14; in one year in ten it comes after May 28. Waiting until May 28 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wisconsin climateThe statewide normals and every place in the state
- Washington Island, WI18 miles from this station, 42.8°F a year
- Sturgeon Bay, WI22 miles from this station, 44.0°F a year
- Marinette, WI24 miles from this station, 44.7°F a year
- Peshtigo, WI30 miles from this station, 43.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made