Fredericksburg weather is normally quite reliable, but thunderstorms can form fairly quickly during the Spring. Most people go to Fredericksburg for shorter periods, so a long-term weather forecast isn't quite as essential for a trip to Fredericksburg.
It's still good to know about the weather's plans when planning your vacation though...
Fredericksburg is in Central Texas, so it has a more continental climate with hot summers and cold winters.
During the hottest summer months (July & August) average temperatures range between 70°F and 93°F. The coldest month is January, with average temperatures ranging between 37°F and 60°F.
Fredericksburg's wettest months are May & June, with an average rainfall of about 4½ inches. October sees some rain too, but it is usually less than 4 inches.
Here's weather forecast for Frederickburg for the next several days:
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I hope the weather in Fredericksburg lets you have a great time!