Honestly, if you’re planning a trip to East Texas, you’ve probably heard the jokes. People say the weather changes every five minutes. In a place like Diana, that’s not just a joke—it’s basically the local law.
Most people think Texas is just one giant, sun-scorched desert. If you tell someone you’re heading to Upshur County, they might expect tumbleweeds. But Diana is tucked away in the Piney Woods. That changes everything. You aren't getting dry desert heat; you're getting that thick, green, humid air that makes the loblolly pines grow 100 feet tall.
Right now, as of January 18, 2026, we’re sitting at 44°F with a light southwest wind. It’s a sunny afternoon, but don't let that fool you. The low tonight is dropping to 26°F. That's the thing about weather in Diana Texas—the swings are wild. One minute you're in a t-shirt, the next you're digging for the heavy wool socks.
Why the Piney Woods Humidity is Different
Humidity in Diana isn't like humidity in Houston. It’s "woods humidity."
In the summer, especially August, the relative humidity can drop to around 56%, which sounds manageable until you realize the high temperatures are averaging 98°F. When that heat gets trapped under the canopy of the East Texas forests, it feels like walking through a warm, damp sponge.
But check this out: January is actually the most humid month here, often hitting 81%. Because it’s cooler—highs around 56°F—it doesn’t feel sticky. Instead, it’s that "bone-chilling" damp cold. It’s the kind of weather where 40 degrees feels way colder than 40 degrees does in a dry place like Lubbock or El Paso.
Surviving the "Crashy" Cold Fronts
The local term "Crashy the Cold Front" exists for a reason.
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In late January, we see these massive temperature drops. Take the next few days in Diana, for instance. Monday and Tuesday (Jan 19-20) are looking pretty standard for winter: highs of 53°F and mostly cloudy. But by the time we hit next weekend, January 24, the forecast is calling for a high of only 30°F with a mix of rain and snow.
Yeah, you read that right. Snow in East Texas.
It doesn't happen often—usually, we just get "ice storms" that turn the pine needles into glass—but when it snows, the whole town basically pauses.
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Diana's Seasonal Breakdown (The Real Version)
- Spring (March–May): This is the "Goldilocks" zone. Temperatures are usually between 70°F and 82°F. It’s beautiful, but it’s also the wettest. May averages over 4 inches of rain. This is also when you have to keep an eye on the sky for those famous East Texas thunderstorms.
- Summer (June–August): It’s hot. There’s no way around it. Highs are consistently in the mid-to-upper 90s. August is the driest month, so expect the grass to turn that crispy golden-brown.
- Fall (September–November): October is secretly the best month in Diana. The average high is 81°F, it’s breezy, and you get about 16 hours of clear, sunny skies. It’s perfect for high school football games or just sitting on a porch.
- Winter (December–February): Volatile. February is technically the wettest month in terms of frequency, with a 31% chance of rain on any given day.
The Severe Weather Reality
Living in or visiting Diana means knowing your "Tornado Alley" geography. While the heart of the alley is further west, East Texas gets plenty of action.
The risk here is different because of the trees. In North Texas, you can see a storm coming from miles away. In Diana, the hills and thick timber mean you rely on your weather radio and apps. Historically, April is the windiest month, with average speeds around 13.6 mph, but it's the gusts during the spring squall lines that you really have to watch for.
What You Should Actually Pack
If you’re coming here, forget the "Texas uniform" you see in movies.
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- Layers are everything. Since it can go from 26°F to 50°F in twelve hours (like it’s doing today), you need a base layer and a solid outer shell.
- Waterproof gear. East Texas gets way more rain than the rest of the state. Annual precipitation is over 32 inches, and it comes down in buckets.
- Sunscreen year-round. Even in January, the UV index hits 3. That winter sun through the trees will still get you.
Actionable Next Steps for Diana Residents and Visitors
If you're tracking the weather in Diana Texas for the coming week, keep an eye on Friday night. The chance of precipitation jumps to 75%, and with the temperature crashing toward 23°F on Saturday night, you need to prepare for potential icing.
- Drip your faucets: When it hits 21°F (forecasted for next Sunday and Monday), those pipes in older East Texas homes are at risk.
- Check your tires: Cold snaps cause pressure to drop.
- Cover the plants: We're in hardiness zone 8B. Most local foliage is tough, but a hard freeze below 25°F will kill off your sensitive landscaping.
Basically, Diana is a place where nature is still very much in charge. Whether it's a humid summer afternoon or a sudden January freeze, the best strategy is to stay flexible and keep a rain jacket in the truck.