Montgomery County (Dayton)
May
Weather in Montgomery County, Ohio for May 2026
Your guide to Montgomery County weather in May - trends and predictions
Until now, May 2026 in Montgomery County is cooler than usual, with temperatures averaging 15.5 °F, this is -3.3 °F below the typical seasonal average.
The forecast for the upcoming days in Montgomery County predicts a temperature of 22.5 °F, which is slightly above the historical average.
In general, the average temperature in Montgomery County at the beginning of May is 18.3 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 21.3 °F by the end of May.
Montgomery County experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 259 mm.
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Temperatures
Rain 🌧️
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7
Dry days
24
Rainy days
0
Snow days
20°/12°
Temperatures
19 km/h
Avg max wind
79 %
Avg humidity
Montgomery County Weather May
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Temperatures trend during May in Montgomery County
See the weather trend as well as the moving average line
May weather in Montgomery County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Partly cloudy | 20° /10° | 1.2 mm | 5 | |
| May 2 |  Light rain shower | 20° /9° | 0.4 mm | 7 | |
| May 3 | Light rain shower | 16° /9° | 42.8 mm | 6 | |
| May 4 | Patchy rain possible | 20° /10° | 1.2 mm | 4 | |
| May 5 | Light rain shower | 17° /10° | 23.8 mm | 3 | |
| May 6 | Patchy rain possible | 16° /9° | 11.6 mm | 4 | |
| May 7 |  Moderate or heavy rain shower | 19° /9° | 3.7 mm | 7 | |
| May 8 |  Overcast | 20° /10° | 2.2 mm | 5 | |
| May 9 | Light rain shower | 20° /9° | 10.6 mm | 5 | |
| May 10 |  Light drizzle | 18° /8° | 0.7 mm | 5 | |
| May 11 | Patchy light rain | 20° /8° | 0.8 mm | 6 | |
| May 12 | Partly cloudy | 20° /8° | 0 mm | 6 | |
| May 13 | Patchy rain possible | 21° /9° | 0.7 mm | 7.1 | |
| May 14 | Partly cloudy | 16° /5° | 0 mm | 7.5 | |
| May 15 | Patchy rain possible | 20° /7° | 0.2 mm | 0.5 | |
| May 16 |  Heavy rain | 20° /13° | 36.5 mm | 4 | |
| May 17 | Patchy rain possible | 27° /16° | 2.9 mm | 5 | |
| May 18 |  Sunny | 28° /16° | 0 mm | 6 | |
| May 19 |  Moderate rain | 21° /17° | 10.6 mm | 4 | |
| May 20 | Patchy rain possible | 24° /17° | 1 mm | 4 | |
| May 21 | Patchy rain possible | 16° /11° | 0.6 mm | 3 | |
| May 22 |  Cloudy | 19° /10° | 0 mm | 3 | |
| May 23 | Sunny | 22° /7° | 0 mm | 4 | |
| May 24 | Sunny | 26° /12° | 0 mm | 5 | |
| May 25 | Sunny | 27° /16° | 0.1 mm | 6 | |
| May 26 | Patchy rain possible | 28° /17° | 1.8 mm | 5 | |
| May 27 | Light rain shower | 18° /13° | 19.1 mm | 4 | |
| May 28 | Patchy rain possible | 18° /12° | 0.3 mm | 5 | |
| May 29 | Patchy rain possible | 18° /11° | 0.5 mm | 4 | |
| May 30 | Sunny | 18° /10° | 4.4 mm | 5 | |
| May 31 | Sunny | 22° /10° | 2 mm | 6 | |
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Important Notice
Our weather forecast for Montgomery County in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Montgomery County forecast closer to your planned date for the most up-to-date weather information.
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Montgomery County in May - FAQ
What are the expected maximum and minimum temperatures in Montgomery County during May?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Montgomery County during May?
Significant rainfall exceeding 259 mm is expected in Montgomery County during May, occurring over more than 24 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Montgomery County during May?
The average wind speed in Montgomery County during May is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Montgomery County
Explore the daily rainfall trends and prepare for Montgomery Countys May weather 💧
Typically, Montgomery County has 24 rainy days in May with a total of 259 mm of rainfall.
UV exposure in Montgomery County during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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