Original analysis, updated October 28, 2026
Clarksville pest data
Middle Tennessee has a long, wet bug season. We pulled 23 years of daily weather from Clarksville's Outlaw Field and Census housing data for 14 ZIP codes around Clarksville and Fort Campbell, and turned them into a pest calendar.
The Clarksville pest year
How we built this- Avg. days with a daily mean of 50°F+ (NOAA, 2002 to 2025)
- Termite swarm season (spring)
- 5+ nights at 65°F or warmer: mosquito months
- 5+ freezing nights: mice move in
Insect-active days per month in Clarksville (daily mean 50°F or warmer)
Warm nights per month, low of 65°F or warmer (peak mosquito nights)
Nights at 32°F or colder by month (when mice move indoors)
Average rainfall by month, Clarksville Outlaw Field (inches)
What we found
- A long active season. Outlaw Field averages 251 days a year with a daily mean of 50°F or warmer (2002 to 2025). From April through October nearly every day qualifies. Even January averages about 4 such days, so insects stir in warm winter spells.
- 2026 ran warm. 244 insect-active days through October 24, 2026, against 226 by that date in an average year, and 77 days at 90°F or hotter against about 44. The hottest reading in the record we pulled was 109°F on June 29, 2012.
- Mosquito nights. About 82 nights a year stay at 65°F or warmer, nearly all from June to August.
- Freezes push mice inside. About 78 nights a year reach 32°F or colder. The median last spring freeze is April 6 and the first fall freeze October 31.
- Rain every month. About 48.7 inches a year, with the wettest month (May) near 5.1 inches. Damp soil and crawlspaces suit subterranean termites.
- Young, rented housing. In the city ZIPs 37040, 37042 and 37043, 48% of homes were built in 2000 or later and 38% of occupied homes are rented. On post (42223) it's 99%. Hopkinsville (42240) is the oldest, with 54% built before 1980.
Insect-active days per year, Clarksville Outlaw Field
All 14 ZIP codes
| ZIP | Area | Homes | Median year built | Built 2000 or later | Built before 1980 | Renter occupied |
|---|---|---|---|---|---|---|
| 37042 | North Clarksville and the Fort Campbell side | 36,524 | 1998 | 45% | 21% | 41% |
| 37040 | Central and North Clarksville | 26,100 | 2001 | 53% | 28% | 42% |
| 37043 | East Clarksville and Sango | 22,938 | 1998 | 46% | 26% | 30% |
| 42240 | Hopkinsville, KY | 18,671 | 1978 | 20% | 54% | 47% |
| 37172 | Springfield | 12,097 | 1990 | 34% | 36% | 31% |
| 37015 | Ashland City | 8,249 | 1992 | 36% | 34% | 23% |
| 42223 | Fort Campbell on post | 4,799 | 1989 | 36% | 34% | 99% |
| 37058 | Dover | 3,843 | 1988 | 29% | 37% | 20% |
| 42262 | Oak Grove, KY | 3,834 | 1998 | 45% | 13% | 59% |
| 37146 | Pleasant View | 3,048 | 2001 | 52% | 18% | 12% |
| 37191 | Woodlawn | 1,645 | 1991 | 21% | 38% | 19% |
| 37052 | Cunningham | 793 | 1991 | 28% | 43% | 6% |
| 37142 | Palmyra | 754 | 1993 | 25% | 27% | 10% |
| 37171 | Southside | 523 | 1990 | 33% | 35% | 28% |
Area names are our shorthand for the main community in each ZIP. Census ACS 2020-2024 5-year estimates (tables B25034, B25035, B25003). Click a column to sort.
How we built this
Weather. NOAA NCEI Global Historical Climatology Network daily summaries for Clarksville Outlaw Field (station USW00003894), April 2001 to October 24, 2026. Yearly and monthly averages use the 23 complete years from 2002 to 2025; 2011 is left out because of a gap in the record. An insect-active day is one where the average of the daily high and low is 50°F or more.
Homes. US Census American Community Survey 2020-2024 5-year estimates by ZIP Code Tabulation Area, via Census Reporter.
Limits. One airport station does not describe every hollow and hillside. Weather and housing age describe conditions; they don't tell you whether your house has a pest problem.
About this data
Where does this data come from?
NOAA NCEI daily weather summaries for Clarksville Outlaw Field (station USW00003894) and the US Census American Community Survey 2020-2024 5-year estimates by ZIP code.
Why use 50°F as the line for insect activity?
Most insects develop slowly or not at all below about 50°F, and 50°F is the base temperature commonly used in degree-day models for insect development. A day with a mean of 50°F or more is a fair, simple marker of an active day.
Can I use these charts?
Yes. Journalists, realtors and inspectors may cite or republish the charts and table with a link to this page (CC BY 4.0).