You’re heading up to Georgetown. Maybe you’re hitting the Rubicon Trail or just grabbing a sandwich at the corner store. Honestly, if you’re looking at the weather forecast Georgetown CA right now, you might be surprised by how mild things feel for mid-January.
It’s Sunday, January 18, 2026.
Right now, it’s basically a gorgeous 62°F outside. Mostly sunny. The wind is just a whisper at 2 mph coming out of the west.
What's happening today?
If you’re stepping out this afternoon, you’ve got it made. We’re looking at a high of 64°F. That’s significantly warmer than the historical average of 53°F for this time of year. Most people expect the Sierra foothills to be freezing and damp in January, but today is giving us a total pass.
Tonight stays pretty comfortable too. It’ll be clear with a low of 46°F. No rain is in the cards for the evening, so if you’re out late, you won't need the heavy-duty parka—just a decent jacket should do.
Looking at the week ahead
Tomorrow, Monday, stays sunny with a high of 61°F. But things start to shift a little bit by Tuesday. We’re moving into a stretch of cloudy days.
Here is the quick breakdown for the next few days:
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- Tuesday: Cloudy. High of 63°F, Low of 43°F.
- Wednesday: Still cloudy. High drops to 60°F.
- Thursday: Partly sunny. High of 58°F.
- Friday: Back to full sun. High of 54°F.
Notice that temperature slide? By the time we hit next weekend, those daytime highs are dropping into the mid-50s. It’s a slow crawl back toward typical winter weather. Humidity is hovering around 54% for the next couple of days, so it won’t feel "heavy" out there, just crisp.
Why Georgetown weather is weird
Georgetown sits at an elevation of about 2,667 feet. That’s the "Goldilocks zone" of the foothills. You're above the thick valley fog that socks in Sacramento, but usually below the heavy snow line of the high Sierras.
But here is what most people get wrong: orographic lifting.
Basically, as air travels up the mountains, it cools and dumps moisture. That’s why Georgetown gets nearly four times the rain of the valley floor. While it’s mostly sunny today, that 10% chance of rain you see in the forecast for Tuesday and Wednesday can turn into a localized drizzle real fast.
Real-world advice for your trip
If you’re planning to be outdoors this week, keep an eye on the UV index. Even though it's January, today’s index is at a 2. It’s low, but with the thinner air at this altitude, the sun can still catch you off guard if you’re out all day.
Honestly, the biggest thing to watch is the overnight temp drop. We’re going from 64°F today down to 35°F by next Friday night. That’s a nearly 30-degree swing. If you’re staying in a cabin or camping, make sure your pipes are protected and your heater is actually working.
Plan your outdoor activities for the early afternoons this week to catch the peak warmth before the clouds settle in on Tuesday. If you're driving up from the valley, don't expect the 60-degree weather to last forever—pack layers for that Friday cool-down.