Weather in Greenville, Wisconsin
Roses open along the stoops. Day 59 of spring. Read this microseason across nine climate regions →
- TodayMay 16Drizzle75%85°60°
- SundayMay 17Heavy Rain43%65°51°
- MondayMay 18Rain77%72°54°
- TuesdayMay 19Light Showers81%70°49°
- WednesdayMay 20Overcast—56°40°
- ThursdayMay 21Partly Cloudy—59°36°
- FridayMay 22Light Drizzle12%60°42°
- PM 2.5
- 8.4 μg/m³
- PM 10
- 9.8 μg/m³
- NO₂
- 11.1 μg/m³
- Ozone
- 70.0 μg/m³
- UV Index
- 0.0 Low
When the dew is on the grass, rain will never come to pass.
- Moonrise
- 10:26 AM
- Moonset
- 1:50 AM
- In sign
- ♊︎ Gemini
Roses open along the stoops
Greenville at a glance
- Today vs. normal: 67°F — typical for the season
- Last frost: May 12 (climatological average for this latitude)
- Microseason: 28 of 72, May 16–20
- Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.
Right now in the garden
Cool-season window is open
As of May 17, the cool-season window is open or about to open. Direct-sow peas, lettuce, spinach, radishes, and brassicas now. Hold off on warm-season crops until 1–2 weeks after the last spring frost (around May).
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | — | — |
| May | lettuce, peas, spinach, radishes | lettuce, peas, radishes |
| June | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | tomatoes, peppers, beans, squash, fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | — | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
Greenville's warmest month is July (~71°F mean) and its coldest is January (~18°F). Rainfall peaks in June (4.7 inches) and bottoms out in February (1.1 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 18° | 1.4″ | 4 |
| February | 20° | 1.1″ | 4 |
| March | 31° | 1.9″ | 5 |
| April | 44° | 3.2″ | 7 |
| May | 57° | 3.6″ | 8 |
| June | 67° | 4.7″ | 8 |
| July | 71° | 3.8″ | 7 |
| August | 70° | 3.6″ | 7 |
| September | 61° | 3.2″ | 6 |
| October | 49° | 2.8″ | 6 |
| November | 36° | 2.1″ | 5 |
| December | 24° | 1.8″ | 5 |
Regional context
Greenville sits within a warm-summer humid continental climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: Milwaukee, WI, Madison, WI, Appleton, WI, Green Bay, WI, Racine, WI.
Frequently asked
- When does it freeze in Greenville?
- Greenville's last spring frost typically falls around mid-May, and the first fall frost arrives around mid-October.
- What is the rainy season in Greenville?
- June is the wettest month with about 4.7 inches of rain on average; the city receives roughly 33 inches annually.
- What is the warmest month in Greenville?
- July is typically warmest, averaging about 71°F.
- What is the coldest month in Greenville?
- January is typically coldest, averaging about 18°F.
- When can I start a vegetable garden in Greenville?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-May); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Greenville get?
- Greenville averages about 70 rainy days per year.
- What hardiness zone is Greenville?
- Greenville's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Greenville, Wisconsin sits in a warm-summer humid continental climate zone. January means hover near 18°F while July averages 71°F — a 54°F seasonal swing.
Across the year, Greenville receives about 33 inches of precipitation spread over roughly 70 rainy days.
The rhythm of the year is set by latitude (44.3°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.