Honestly, if you've lived in Solano County for more than a week, you know the "official" weather report is usually just a suggestion. Fairfield has this weird, micro-climate energy where the wind off the Delta decides to do its own thing regardless of what the apps say.
But right now, looking at the 10 day forecast fairfield ca, we're in one of those classic "fake spring" stretches that January loves to tease us with.
The Immediate Vibe: Chilly but Not Freezing
Today, Sunday, January 18, 2026, is basically as good as it gets for mid-winter. We're looking at a high of 60°F and a low of 41°F. It's mostly cloudy, which sounds depressing, but it actually keeps the heat in a bit. The wind is currently coming from the east at a lazy 6 mph.
If you’re planning to hit the Rockville Hills Regional Park today, do it. The trails are finally drying out from that New Year’s atmospheric river, though some spots are still a total mud pit.
Why the Next 10 Days Look "Meh"
Kinda weirdly, the temperature is going to be incredibly consistent. We aren't seeing those massive 20-degree swings.
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- Monday (Jan 19): High of 58°F, low of 41°F. Mostly cloudy at night. It’s MLK Day, so expect the Jelly Belly Factory to be packed if you’re looking for indoor stuff.
- Tuesday & Wednesday (Jan 20-21): The "Gray Days." Highs around 58°F and 57°F. It’s going to be cloudy, and honestly, it’ll feel colder than it is because of the 80% humidity.
- The Late Week Slump: Thursday and Friday (Jan 22-23) stay in that 58°F to 59°F range. Lows are creeping up to 44°F.
Basically, you’ve got a solid week of "light jacket weather." No big storms are looming, though there’s a persistent 10% chance of rain almost every single day. That's just enough to make your car look dirty but not enough to actually water the lawn.
What’s Really Going On with the Rain?
People get stressed when they see "rain" on a 10-day forecast. Don't.
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For the 10 day forecast fairfield ca, most of that precipitation is just Delta mist or high-altitude clouds that won't ever touch the ground. The only real "wet" day might be next Saturday, January 24, where the chance of rain bumps up to 20%. Even then, we're talking a high of 55°F. It’s more of a drizzle situation.
The "Dry" Finale
By the time we hit Monday, January 26, and Tuesday, January 27, things actually clear up. We’re expecting full-blown sun. Highs will be 55°F to 57°F, but with the sun out, it’ll feel much warmer. That’s the time to finally wash the car or do that yard work you've been putting off since December.
Expert Nuance: The Delta Breezeway
What the generic forecasts miss is the wind direction. Most of this week, the wind is coming from the northeast or east. This is "dry" wind. Unlike the summer, where the "Fairfield Breeze" cools us down from the southwest, these inland winds can actually make the air feel sharper.
If you're volunteering for the Trash Mob on January 24 or heading to the Girl Scouts Snow Day event on January 21 at Rolling Hills Elementary, keep that humidity in mind. 74% to 84% humidity at 57°F feels much clammier than a dry 50 degrees.
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Actionable Next Steps
- Check your tires: The humidity is high (hitting 84% by next weekend), and those early morning roads in the North Bay get slick with "invisible" moisture.
- Layer up: Since we’re hovering between 41°F and 60°F, a heavy coat is overkill, but a hoodie won't cut it once the sun drops at 5:12 PM.
- Gardening: Hold off on any major planting. While it’s not freezing, that 41°F low is still enough to shock new starts.
The bottom line? This 10-day stretch is stable. No floods, no heatwaves, just a lot of gray skies and decent walking weather.