Chattanooga, Tennessee
Chattanooga, TN Pest Season Calendar, Month by Month
A month-by-month calendar for Chattanooga that sets NOAA's 1991–2020 climate normals for Lovell Field beside the pest timing this site cites, labeled by source. It describes typical seasons, not counts at any property. Who can I call about pests in Chattanooga, TN? Use the call button below. This site connects you with an independent pest control company.
When is pest season in Chattanooga, TN?
Chattanooga's termite season opens in March, when University of Tennessee Extension publication PB1344 puts the first eastern subterranean swarms, and the outdoor year winds down around November 9, the median first fall freeze at Lovell Field (NOAA 1991–2020 normals). The median freeze-free season is 230 days. Rodents and roaches run the other way, pressing indoors as nights cool.
Each calendar row names its evidence: NOAA normals for station USW00013882, UT Extension PB1344 and the 2025 UT trap survey for termites, or the practitioner pattern local operators describe. No row ties a pest to a temperature threshold; no published source for one was found, so the climate columns are context, not a trigger.
What changes month by month around Chattanooga?
UT Extension PB1344 puts eastern subterranean termite swarms in daylight from March to May, the dark southeastern species from April to June or in the fall, and the light southeastern species from August to October. Summer brings mosquitoes and roaches through months when Lovell Field averages 12 to 19 days at 90°F or hotter; fall brings rodents and stink bugs indoors.
| Month | Avg °F (high / low) | Rain (in) | Nights ≤32°F | Days ≥90°F | Pest timing and source |
|---|---|---|---|---|---|
| January | 41.7 (51.0 / 32.4) | 5.02 | 17.0 | 0.0 | Roaches and rodents active indoors; quietest outdoor month (practitioner pattern) |
| February | 45.6 (55.6 / 35.6) | 5.03 | 12.0 | 0.0 | Rodents established indoors (practitioner pattern); PB1344 notes flights can occur off-season in heated buildings |
| March | 53.2 (64.1 / 42.2) | 5.34 | 5.0 | 0.0 | Eastern subterranean swarms begin, by day, often a warm day after rain (UT PB1344); median last freeze March 24 and wettest month (NOAA) |
| April | 61.7 (73.6 / 49.9) | 4.87 | 0.4 | 0.1 | Eastern swarms continue; dark southeastern swarms begin (UT PB1344); ant and termite peak (practitioner pattern); 10% chance of a freeze on or after April 8 (NOAA) |
| May | 70.0 (81.0 / 59.0) | 3.94 | 0.0 | 2.6 | Eastern swarm window ends (UT PB1344); Formosan termites swarm at night in late spring (UT 2025 trap survey) |
| June | 77.4 (87.6 / 67.3) | 4.18 | 0.0 | 11.6 | Dark southeastern swarm window ends (UT PB1344); mosquitoes, roaches and bed bugs (practitioner pattern) |
| July | 80.7 (90.5 / 71.0) | 5.08 | 0.0 | 18.6 | Hottest month (NOAA); mosquitoes and roaches (practitioner pattern) |
| August | 80.0 (89.8 / 70.2) | 3.67 | 0.0 | 17.3 | Light southeastern swarms begin (UT PB1344); mosquitoes and roaches |
| September | 73.9 (84.3 / 63.6) | 4.23 | 0.0 | 7.2 | Light southeastern swarms; dark southeastern fall flights possible (UT PB1344); rodents and stink bugs start pressing indoors (practitioner pattern) |
| October | 62.7 (74.1 / 51.4) | 3.59 | 0.3 | 0.4 | Light southeastern swarm window ends (UT PB1344); rodents and stink bugs move indoors; 10% chance of first freeze by October 27 and driest month (NOAA) |
| November | 51.2 (62.0 / 40.3) | 4.80 | 6.9 | 0.0 | Median first freeze November 9 (NOAA); rodents indoors (practitioner pattern) |
| December | 44.3 (53.2 / 35.3) | 5.25 | 14.5 | 0.0 | Rodents and roaches indoors near heat and water (practitioner pattern) |
Source: Climate: NOAA NCEI U.S. Climate Normals 1991–2020, Lovell Field (USW00013882), read 2026-10-03. Termites: UT Extension PB1344; UT EPP 2025 Formosan trap survey. Other rows: practitioner pattern as labeled.
What do the climate normals say about Chattanooga's year?
July is the hottest month at 80.7°F, with 18.6 days at 90°F or hotter. Lovell Field averages 56.2 nights a year at or below freezing and 55.00 inches of rain, spread fairly evenly: March is wettest at 5.34 inches and October driest at 3.59. The median last spring freeze is March 24 and the median first fall freeze is November 9.
There is a 10 percent chance of a spring freeze on or after April 8, and the first fall freeze comes by October 27 in one year in ten and by November 26 in nine years in ten. These are 30-year averages; a given year can run weeks early or late.
How was this calendar built, and can I reuse it?
Climate columns: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00013882, read 2026-10-03. Termite rows: UT Extension PB1344 and the 2025 UT trap survey; other rows are labeled practitioner descriptions. The data is offered under CC BY 4.0, and the monthly normals download as a CSV.
Download the monthly normals: chattanooga-tn-climate-normals-1991-2020.csv
Chattanooga Pest Care is operated by BetterAds Solutions LLC as a referral connection service and does not inspect or treat properties. Related: termite treatment, mosquito control, rodent control.
How do I cite this page?
Suggested citation: Chattanooga Pest Care (BetterAds Solutions LLC), edited by Anna Walker. "Chattanooga, TN Pest Season Calendar, Month by Month." Retrieved 2026-10-03. https://chattanoogapestcare.com/pest-season/
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