October is one of the warmer months of the year in Bloomington, with average highs near 18.3°C and lows around 6.2°C (mean 12.3°C). It is about average for rainfall, averaging 83 mm of rainfall and 72% relative humidity across the period.
October is one of the warmer months of the year in Bloomington. Across 45 years of records, the warmest October in Bloomington was 2007 — when the month averaged 15.5°C — while the coldest was 1987 at 8.8°C. Typical October days reach 18.3°C with nights near 6.2°C. The long-term trend is warming, about 0.4°C per decade.
October is about average for rainfall in Bloomington, averaging 83 mm of rainfall. The wettest October on record was 2009 with 219 mm, while the driest was 2024 at 18 mm.
Relative humidity in Bloomington during October averages 72%. The most humid October was 2009 at 84%, and the least humid was 2024 at 57%.
October receives about 3.2 kWh/m²/day of solar energy in Bloomington. The sunniest October was 2024 at 3.9 kWh/m²/day, and the cloudiest was 2009 at 2.3.
Average wind speed in Bloomington during October is 3.2 m/s. The windiest October was 2012 at 3.8 m/s, while the calmest was 1992 at 2.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.6°C | 11.9°C | 12.2°C | 12.5°C | 13.6°C | +2°C |
| Avg High | 17.6°C | 18.2°C | 18.1°C | 18.4°C | 19.9°C | +2.3°C |
| Avg Low | 5.6°C | 5.5°C | 6.3°C | 6.7°C | 7.3°C | +1.7°C |
| Avg Rain | 75 mm | 81 mm | 92 mm | 84 mm | 82 mm | +7 mm |
October temperatures in Bloomington have risen by about 1.6°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -7.4°C (2019) to a record high of 32.5°C (2025).
Rainfall in October is about average for rainfall, averaging 83 mm, with a wettest year of 219 mm.
A good time to visit Bloomington
October is a good time to visit Bloomington, with days averaging 18.3°C and nights around 6.2°C (mean 12.3°C, warmer than Bloomington's yearly average) and higher rainfall. August and June are marginally more temperate, but October still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 21.9°C | 15.4°C | 8.9°C | 32.5°C | 0.4°C | 43 mm | 62% | 3 m/s | 3.5 |
| 2024 | 22.4°C | 14.9°C | 7.4°C | 29.5°C | -0.1°C | 18 mm | 57% | 3.1 m/s | 3.9 |
| 2023 | 19.2°C | 13.3°C | 7.5°C | 30.9°C | -4.4°C | 113 mm | 72% | 3.3 m/s | 3 |
| 2022 | 18.8°C | 11.9°C | 5.0°C | 26.4°C | -3.8°C | 77 mm | 63% | 3.4 m/s | 3.7 |
| 2021 | 19.7°C | 14.9°C | 10.0°C | 29.2°C | 2.1°C | 199 mm | 81% | 3 m/s | 2.6 |
| 2020 | 17.2°C | 11.0°C | 4.8°C | 27.7°C | -2.8°C | 45 mm | 70% | 3.3 m/s | 3 |
| 2019 | 16.9°C | 11.3°C | 5.7°C | 30.6°C | -7.4°C | 118 mm | 76% | 3.4 m/s | 3 |
| 2018 | 17.9°C | 12.1°C | 6.2°C | 30.9°C | -3.9°C | 107 mm | 75% | 3.3 m/s | 3.1 |
| 2017 | 19.8°C | 14.2°C | 8.6°C | 29.0°C | -4.2°C | 122 mm | 72% | 3.5 m/s | 2.8 |
| 2016 | 20.1°C | 14.5°C | 8.9°C | 27.8°C | 2.2°C | 52 mm | 81% | 3.1 m/s | 3.1 |
| 2015 | 18.8°C | 12.9°C | 6.9°C | 26.3°C | -1.1°C | 42 mm | 70% | 3.4 m/s | 3.4 |
| 2014 | 16.9°C | 11.6°C | 6.3°C | 26.0°C | -1.0°C | 90 mm | 79% | 3.2 m/s | 2.8 |
| 2013 | 18.5°C | 12.3°C | 6.1°C | 29.0°C | -4.2°C | 108 mm | 73% | 3.1 m/s | 3 |
| 2012 | 16.3°C | 10.7°C | 5.0°C | 26.3°C | -2.6°C | 120 mm | 74% | 3.8 m/s | 3.1 |
| 2011 | 19.3°C | 12.8°C | 6.3°C | 28.9°C | -0.7°C | 35 mm | 67% | 3 m/s | 3.5 |
| 2010 | 19.7°C | 13.1°C | 6.5°C | 28.6°C | -3.6°C | 42 mm | 67% | 3.1 m/s | 3.8 |
| 2009 🌧️ | 13.7°C | 9.1°C | 4.5°C | 20.4°C | -2.4°C | 219 mm | 84% | 3.4 m/s | 2.3 |
| 2008 | 17.4°C | 11.5°C | 5.6°C | 26.6°C | -4.2°C | 67 mm | 78% | 3.1 m/s | 3.5 |
| 2007 🔥 | 21.6°C | 15.5°C | 9.4°C | 31.9°C | -0.4°C | 83 mm | 70% | 3.4 m/s | 3.1 |
| 2006 | 16.3°C | 10.3°C | 4.4°C | 31.7°C | -4.1°C | 75 mm | 70% | 3.5 m/s | 3.2 |
| 2005 | 19.4°C | 13.5°C | 7.6°C | 30.4°C | 0.2°C | 45 mm | 70% | 2.9 m/s | 3.3 |
| 2004 | 18.5°C | 12.7°C | 6.9°C | 27.0°C | -1.6°C | 118 mm | 73% | 3.3 m/s | 2.9 |
| 2003 | 18.8°C | 12.3°C | 5.8°C | 28.1°C | -2.0°C | 46 mm | 69% | 2.8 m/s | 3.5 |
| 2002 | 16.8°C | 10.9°C | 4.9°C | 30.4°C | -1.7°C | 59 mm | 71% | 2.8 m/s | 3 |
| 2001 | 17.4°C | 11.8°C | 6.1°C | 28.2°C | -2.3°C | 150 mm | 74% | 3.7 m/s | 3 |
| 2000 | 20.8°C | 14.2°C | 7.5°C | 28.2°C | -2.9°C | 58 mm | 69% | 2.8 m/s | 3.3 |
| 1999 | 19.0°C | 12.1°C | 5.3°C | 26.8°C | -3.7°C | 40 mm | 65% | 3.2 m/s | 3.4 |
| 1998 | 19.7°C | 13.3°C | 6.9°C | 26.4°C | -0.8°C | 88 mm | 73% | 3 m/s | 3.2 |
| 1997 | 18.8°C | 12.4°C | 6.1°C | 30.2°C | -3.1°C | 48 mm | 68% | 3.2 m/s | 3.5 |
| 1996 | 19.2°C | 12.4°C | 5.6°C | 27.8°C | -3.0°C | 55 mm | 69% | 3.5 m/s | 3.1 |
| 1995 | 19.0°C | 12.6°C | 6.2°C | 28.0°C | 0.0°C | 94 mm | 67% | 3.6 m/s | 3.2 |
| 1994 | 18.8°C | 12.5°C | 6.2°C | 27.7°C | -1.3°C | 72 mm | 71% | 3.1 m/s | 3 |
| 1993 | 15.0°C | 9.4°C | 3.8°C | 24.4°C | -3.9°C | 71 mm | 83% | 2.9 m/s | 3.1 |
| 1992 | 17.3°C | 11.0°C | 4.7°C | 26.0°C | -6.4°C | 49 mm | 74% | 2.7 m/s | 3.2 |
| 1991 | 17.8°C | 12.0°C | 6.2°C | 27.3°C | -2.7°C | 185 mm | 75% | 3.5 m/s | 3.2 |
| 1990 | 17.3°C | 10.8°C | 4.3°C | 27.7°C | -1.7°C | 111 mm | 72% | 3.4 m/s | 3.3 |
| 1989 | 18.5°C | 12.0°C | 5.5°C | 27.1°C | -1.2°C | 33 mm | 72% | 3.4 m/s | 3.3 |
| 1988 | 15.3°C | 9.0°C | 2.7°C | 25.0°C | -6.0°C | 48 mm | 60% | 3.4 m/s | 3.5 |
| 1987 ❄️ | 15.2°C | 8.8°C | 2.4°C | 23.3°C | -2.4°C | 32 mm | 64% | 3.1 m/s | 3.3 |
| 1986 | 17.2°C | 11.8°C | 6.4°C | 24.3°C | -1.0°C | 120 mm | 83% | 2.9 m/s | 2.8 |
| 1985 | 18.8°C | 13.1°C | 7.4°C | 26.9°C | 1.2°C | 115 mm | 73% | 3.2 m/s | 2.9 |
| 1984 | 19.8°C | 14.2°C | 8.5°C | 26.5°C | 0.4°C | 114 mm | 76% | 3 m/s | 2.4 |
| 1983 | 18.5°C | 12.7°C | 6.9°C | 30.1°C | -0.1°C | 92 mm | 71% | 3.4 m/s | — |
| 1982 | 19.2°C | 12.7°C | 6.3°C | 28.3°C | -3.5°C | 74 mm | 69% | 3.1 m/s | — |
| 1981 | 15.8°C | 10.0°C | 4.1°C | 25.3°C | -5.7°C | 49 mm | 77% | 3.1 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 18.3°C with lows near 6.2°C (mean 12.3°C), based on 45 years of NASA POWER data.
October averages 83 mm of rainfall in Bloomington, about average for rainfall. The wettest on record was 219 mm in 2009.
The hottest October reached 32.5°C in 2025. The coldest dipped to -7.4°C in 2019.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1.6°C. Daytime highs moved from 18.4°C to 20.4°C and overnight lows from 6.6°C to 7.8°C over the same span.
October is one of the warmer months of the year in Bloomington and about average for rainfall, so plan for around 18.3°C daytime highs and 6.2°C at night.
Not quite — October is the 7th coolest month in Bloomington, averaging 12.3°C.
For October in Bloomington, pack warm layers and a jacket for chilly mornings, with typical highs of 18.3°C and lows of 6.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 72% — moderately humid.
Average wind speed in October is 3.2 m/s. The windiest October on record averaged 3.8 m/s (2012).
The wettest October on record was 2009 with 219 mm. On average, October sees 83 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Bloomington behaves each October, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for October specifically, along with year-by-year records and how the month has changed over the decades.
