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Grayson County (Sherman)
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United States weather

Weather in Grayson County, Texas for May 2026

Your guide to Grayson County weather in May - trends and predictions

    Temperatures

  • In general, the average temperature in Grayson County at the beginning of May is 22.6 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 28.1 °F by the end of May.

    • Rain 🌧️

  • The climate of Grayson County in May is notably wet, with an average of 11 rainy days, and a total of 189.5 mm of precipitation.

    • More

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Average dry days
20
Dry days
Average rainy days
11
Rainy days
Average snowy days
0
Snow days
Average temperatures
27°/17°
Temperatures
Average wind speed
26 km/h
Avg max wind
Average humidity
78 %
Avg humidity

Grayson County Weather May

Move between months or click on a day
April
June
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Overcast
25°
2
Moderate or heavy rain shower
21°
3
Sunny
22°
4
Sunny
22°
5
Patchy rain possible
23°
6
Moderate or heavy rain shower
20°
7
Patchy rain possible
25°
8
Overcast
22°
9
Patchy rain possible
24°
10
Patchy rain possible
23°
11
Cloudy
21°
12
Overcast
26°
13
Sunny
32°
14
Partly cloudy
35°
15
Patchy rain possible
28°
16
Thundery outbreaks possible
29°
17
Fog
28°
18
Thundery outbreaks possible
28°
19
Thundery outbreaks possible
28°
20
Overcast
27°
21
Moderate rain at times
31°
22
Moderate or heavy rain shower
30°
23
Moderate or heavy rain shower
29°
24
Overcast
33°
25
Moderate rain at times
30°
26
Sunny
31°
27
Sunny
26°
28
Moderate or heavy rain shower
27°
29
Heavy rain at times
27°
30
Moderate or heavy rain shower
27°
31
Light rain shower
29°

Temperatures trend during May in Grayson County

See the weather trend as well as the moving average line

May weather in Grayson County day by day

Click on a date for more information
April June
Date Weather Temperatures Rain UV More
May 1 Overcast
Overcast
 25° /14° 0 mm 5
May 2 Moderate or heavy rain shower
Moderate or heavy rain shower
 21° /16° 11.3 mm 5
May 3 Sunny
Sunny
 22° /10° 0 mm 6
May 4 Sunny
Sunny
 22° /10° 0 mm 6
May 5 Patchy rain possible
Patchy rain possible
 23° /10° 0.2 mm 5
May 6 Moderate or heavy rain shower
Moderate or heavy rain shower
 20° /15° 50 mm 4
May 7 Patchy rain possible
Patchy rain possible
 25° /15° 0.2 mm 6
May 8 Overcast
Overcast
 22° /13° 0 mm 5
May 9 Patchy rain possible
Patchy rain possible
 24° /13° 0.5 mm 5
May 10 Patchy rain possible
Patchy rain possible
 23° /13° 0.1 mm 5
May 11 Cloudy
Cloudy
 21° /12° 0 mm 5
May 12 Overcast
Overcast
 26° /12° 0 mm 6
May 13 Sunny
Sunny
 32° /16° 0 mm 8
May 14 Partly cloudy
Partly cloudy
 35° /21° 0 mm 9
May 15 Patchy rain possible
Patchy rain possible
 28° /22° 0.1 mm 6
May 16 Thundery outbreaks possible
Thundery outbreaks possible
 29° /22° 0 mm 6
May 17 Fog
Fog
 28° /22° 0 mm 6
May 18 Thundery outbreaks possible
Thundery outbreaks possible
 28° /22° 0 mm 6
May 19 Thundery outbreaks possible
Thundery outbreaks possible
 28° /22° 0 mm 6
May 20 Overcast
Overcast
 27° /19° 0 mm 6
May 21 Moderate rain at times
Moderate rain at times
 31° /18° 0.8 mm 7
May 22 Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /19° 10.9 mm 7
May 23 Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /18° 10.1 mm 6
May 24 Overcast
Overcast
 33° /21° 0 mm 7
May 25 Moderate rain at times
Moderate rain at times
 30° /21° 4.6 mm 7
May 26 Sunny
Sunny
 31° /21° 6.6 mm 7
May 27 Sunny
Sunny
 26° /19° 60.6 mm 7
May 28 Moderate or heavy rain shower
Moderate or heavy rain shower
 27° /18° 15.8 mm 6
May 29 Heavy rain at times
Heavy rain at times
 27° /17° 2.1 mm 6
May 30 Moderate or heavy rain shower
Moderate or heavy rain shower
 27° /18° 9.3 mm 6
May 31 Light rain shower
Light rain shower
 29° /17° 10.8 mm 7
Next
Important Notice
Our weather forecast for Grayson 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 Grayson County forecast closer to your planned date for the most up-to-date weather information.
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Grayson County in May - FAQ

What are the expected maximum and minimum temperatures in Grayson County during May?
During May, expect a variety of temperatures with highs around 27° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Grayson County during May?
Significant rainfall exceeding 189.5 mm is expected in Grayson County during May, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Grayson County during May?
The average wind speed in Grayson County during May is 26 km/h, suggesting breezy to windy conditions, depending on your activities.

May rainfall patterns in Grayson County

Explore the daily rainfall trends and prepare for Grayson Countys May weather 💧

UV exposure in Grayson County during May

Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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Sherman
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Location coordinates Where is Grayson County?

Get accurate weather forecasts for Grayson County, located at latitude 33.636 and longitude -96.609. Stay updated with localized weather information tailored for Grayson County.

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