Carmel, IN weather in September
Expect mild weather with some rain in Carmel in September, with highs near 77°F and lows near 55°F. Rain falls on about 7 days. Good for outdoor plans.
- Normal high
- 77°F
- Normal low
- 55°F
- Wet days
- 7
- 3.3 in total
- Muggy days
- 5
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 80°F | 72°F |
| Normal low | 60°F | 50°F |
| Chance of a wet day | 21% | 23% |
| Sunrise / sunset | 7:12 am / 8:16 pm | 7:39 am / 7:29 pm |
| Daylight | 13.1 h | 11.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical September day
- 6 am60°Fdew point 56°F
- 9 am65°Fdew point 57°F
- Noon74°Fdew point 57°F
- 3 pm77°Fdew point 56°F
- 6 pm74°Fdew point 56°F
- 9 pm67°Fdew point 56°F
NOAA hourly normals (local standard time) from Indianapolis (21 mi away); average wind 8 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F13 of 30
- Hot dayshigh 90°F or more2 of 30
- Muggy daysdaily mean dew point 65°F or more5 of 30
- Wet daysat least 0.01 in of rain or melted snow7 of 30
- Notable rainat least 0.10 in5 of 30
- Freezing nightslow 32°F or below0 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 3.3 in; a dry September brings about 1.2 in and a wet one about 5.3 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How September varies from year to year
- Warmest September, 1991-20201998: average high 84°F
- Coolest September2011: average high 72°F
- Wettest September2003: 8.7 in
- Driest September2020: 0.2 in
- Highest reading96°F (September 5, 1999)
- Lowest reading28°F (September 23, 1995)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 82°F | 77°F | 65°F |
| Normal low | 62°F | 55°F | 44°F |
| Wet days | 7 | 7 | 7 |
| Comfortable days | 5 | 13 | 14 |
| Daylight | 13.7 h | 12.4 h | 11.1 h |
Highs change by -5°F from August and -12°F into October.
Nearby alternatives in September
- Warmer: Louisville, KY128 mi · high 82°F · 8 wet days
How Carmel ranks in September
- Normal high248th warmest of 378 cities; 3rd of 6 in Indiana
- Wet days132nd driest of 378
- Comfortable days123rd most of 342
Heating and cooling
September has 80 heating degree days and 104 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Carmel in September?
The normal high is 77°F and the normal low is 55°F. From 1991 to 2020 the hottest September reading was 96°F (most recently on September 5, 1999).
Does it rain a lot in Carmel in September?
About 7 days in September have at least 0.01 in of precipitation, and the normal total is 3.3 in. The wettest September in 1991-2020 was in 2003 (8.7 in); the driest was in 2020 (0.2 in).
Is September a good time to visit Carmel?
September ranks 3rd of 12 months on our comfort score for Carmel (65 out of 100). It has about 13 comfortable days and about 2 days at 90°F or hotter. The best months are April and May.
Where the numbers come from
- Temperature, rain and snow depth: Whitestown (USC00129557), 13 mi W of the city center, 941 ft (88 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Snowfall and humidity and wind by hour: Indianapolis (USW00093819), 21 mi SSW of the city center, 790 ft (63 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Carmel 3 E (USC00121303), 3.4 mi ESE of the city center, 752 ft (101 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Indianapolis International Airport (724380-93819), 20 mi SSW of the city center, 792 ft (61 ft lower than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).