Zionsville has chilly winters and pleasant summers. A typical July afternoon reaches 84°, a January night drops to 19°, and about 22 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normalsUpdated once a decade
☀️
July high
84°
456th coolest of 1,978 Indiana towns
❄️
January low
19°
878th coldest of 1,978 Indiana towns
💧
Rain + melted snow
42 in
825th driest of 1,978 Indiana towns
🌨️
Snow a winter
22 in
806th snowiest of 1,972 Indiana towns
A normal year
What a year in Zionsville feels like
❄️
Winter
37° / 22°
Typical high / low · 8 days with an inch or more of snow
🌷
Spring
62° / 41°
Typical high / low · Last frost around Apr 21
☀️
Summer
82° / 62°
Typical high / low · 18 days reach 90° in a normal year
🍂
Fall
64° / 43°
Typical high / low · First frost around Oct 20
10°
20°
40°
50°
60°
70°
80°
90°
100°
32°
34°
19°
39°
22°
50°
31°
63°
41°
72°
51°
81°
61°
84°
64°
82°
62°
77°
54°
65°
43°
51°
33°
39°
24°
JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD
32°, freezingBar runs from the typical overnight low up to the afternoon high
Best months to be outsideAprMayJunJulAugSepOctHighs of 62–84° and lows of 40° or more
Month by month
Zionsville weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
Month
High
Low
Rain + melt
Snow
Wet days
Snow on ground
30-yr range
January
34°
19°
2.8"
7.2"
10
11
18° – 39°
February
39°
22°
2.3"
6.8"
8
8
18° – 42°
March
50°
31°
3.2"
2.4"
9
2
33° – 54°
April
63°
41°
4.2"
0.2"
11
0
45° – 57°
May
72°
51°
4.5"
0
11
0
56° – 70°
June
81°
61°
4.9"
0
9
0
66° – 74°
July
84°
64°
4.1"
0
9
0
68° – 80°
August
82°
62°
3.3"
0
7
0
67° – 78°
September
77°
54°
3.2"
0
7
0
61° – 70°
October
65°
43°
3.2"
0.1"
7
0
49° – 60°
November
51°
33°
3.4"
0.6"
8
1
34° – 49°
December
39°
24°
2.7"
4.7"
10
6
18° – 41°
Year
61°
42°
41.8"
22.0"
105
28
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain & snow
Rain and snow in Zionsville
Zionsville gets 42 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 105 days a year. Snow covers the ground about 28 days of the year.
💧
42 in
Rain + melted snow a year
More rain than 57% of U.S. towns
❄️
22 in
Snow in a normal winter
Less snow than 54% of U.S. towns
⛄
28 days
With 1"+ of snow on the ground
More than 50% of U.S. towns
Rain + melted snow by month
Inches of water
4.9"
JFMAMJJASOND
Snowfall by month
Inches of snow
7.2"
JFMAMJJASOND
Frost & the growing season
About 180 frost-free days a year
In half of years the last 32° night comes by April 21 and the first one by October 20. That leaves about 180 frost-free days for gardens, longer than 53% of U.S. towns.
🌱 Apr 21
🍂 Oct 20
180 frost-free days
JFMAMJJASOND
🥶
114
nights at or below 32° in a normal year
🧊
5
nights below 0° in a normal year
🔥
18
days that reach 90° in a normal year
Freezing nights by month
Average nights at or below 32°
JFMAMJJASOND
90° days by month
Average days at 90° or more
JFMAMJJASOND
Heating & cooling
Heating and cooling a home in Zionsville
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Zionsville, 86% of that work is heating and 14% is cooling, so the furnace matters far more than the air conditioner.
🔥
5,617 heating degree daysLess heating than 54% of U.S. towns
❄️
896 cooling degree daysMore cooling than 54% of U.S. towns
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Around Zionsville
Zionsville and its neighbors
Zionsville borders 12 towns with climate data. January nights across them vary by 1.9°. Center has the coldest January nights (18°) and Indianapolis the hottest July afternoons (85°). Zionsville’s January low is 19° and its July high 84°.
Compared with every U.S. town and city on TownTapestry, each counted once.
Then and now
Warmer than it used to be
+1.2°1991–2020 average vs. the 20th century (1901–2000)
The last 30 years in Zionsville averaged 1.2° warmer than the 1900s. The biggest change is in December (+2.3°). The shift is smaller than in 56% of U.S. towns.
❄️ Winter+1.7°now 30°, was 28°
🌷 Spring+1.6°now 51°, was 50°
☀️ Summer+0.3°now 72°, was 72°
🍂 Fall+1.0°now 54°, was 53°
Change by month1991–2020 average minus 1901–2000 average, at Zionsville’s spot on NOAA’s grid
−0.3°
+2.3°
JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD
Year to year
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 18° to 42°. June is the most reliable, staying within 7°.
10°
20°
30°
40°
50°
60°
70°
80°
90°
JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD
Coldest to warmest month in 30 yearsNormal
Questions
Common questions about Zionsville’s climate
What is the coldest month in Zionsville?
January, with a typical high of 34° and a low of 19°.
What is the hottest month in Zionsville?
July, with a typical high of 84° and a low of 64°. About 18 days a year reach 90°.
How much snow does Zionsville get?
About 22 inches in a normal winter, most of it in January.
When is the first frost in Zionsville?
In half of years the first 32° night comes by October 20, and the last spring frost by April 21.
What is the rainiest month in Zionsville?
June, with 4.9 inches of rain and melted snow. The year totals 42 inches.
📍Temperatures and rainfall come from NOAA’s gridded climate normals for Zionsville itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Whitestown, IN (2 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.