PUERTO PENASCO · JANUARY · SEA OF CORTEZ
Puerto Penasco in January is a cool-weather beach town. Afternoons average 67.2°F, nights fall to 51.9°F, and measurable rain turns up on about one day of the month. The Sea of Cortez is the cold part of the picture at 62.3°F, which decides what kind of beach trip this is.
That makes January a walking-and-layers month more than a swimming one. Of its two neighbors, December has the warmer water and February the warmer air. The gaps are small, so the choice comes down to what you plan to do on the sand.
THE MONTH AT A GLANCE · PUERTO PENASCO
January in Puerto Penasco brings dry, mild days (67.2°F highs, 1.1 days of measurable rain) and 62.3°F water, so it suits walkers and sunset-watchers better than swimmers.
HIGH 67.2°F · LOW 51.9°F · SEA 62.3°F · 1.1 RAIN DAYS
Go for: beach walks on dry, mild afternoons, 10 hours 23 minutes of daylight in mid-month, and a month with measurable rain on about one day.
Think twice before: planning long swims. The sea averages 62.3°F, and that figure is already a mean of daily maxima.
Climate: Open-Meteo / ECMWF ERA5 grid cell (model reanalysis, not a station) · Sea: Open-Meteo Marine API · full sources below
On this page
- Puerto Penasco weather in January67.2°F highs, 51.9°F lows and 1.1 rain days
- Can you swim in Puerto Penasco in January?Sea at 62.3°F, plus two swimming beaches
- Crowds and prices in JanuarySonora’s 3% lodging tax and what we could not verify
- Things to do in Puerto Penasco in JanuarySandy Beach, Cholla Bay and the biosphere reserve edge
- Two-day Puerto Penasco itinerary for JanuarySunrise at 7:32 a.m. to sunset at 5:54 p.m.
- Puerto Penasco in January vs December and FebruarySea at 65.4°F in December and 62.0°F in February
- Is January a good time to visit Puerto Penasco?Who January suits and which month to pick instead
Most U.S. visitors reach Puerto Penasco by car through the Lukeville-Sonoyta border crossing. Mar de Cortes International Airport went without scheduled commercial flights for more than five years, and a new scheduled route resumed service in mid-2026.
Puerto Penasco weather in January
| Measure | January (1991-2020 normals) |
|---|---|
| Average high | 67.2°F |
| Average low | 51.9°F |
| Precipitation | 0.36 inches |
| Days with 0.10 inch or more | 1.1 |
| Days with 1 inch or more | 0.0 |
| Daylight on January 15 | 10 hours 23 minutes |
| Sea surface (mean of daily maxima, 2015-2024) | 62.3°F |
Every figure here is an ERA5 model reanalysis, published through Open-Meteo and ECMWF, using 1991-2020 normals for the grid cell over Puerto Penasco on the Sea of Cortez coast. It is not a thermometer reading. None of the town’s three CONAGUA stations publishes a normals product. For January the cell gives an average high of 67.2°F, an average low of 51.9°F and 0.36 inches of precipitation.
In an average January, 1.1 days record at least 0.10 inch of rain, and 0.0 days record an inch or more. Measurable rain shows up about once in the month, and a soaking is not what the normals predict. Most trips will not lose a day to weather, and a light shell covers the odd drizzle.
The average high sits 15.3°F above the average low, so one day runs from a light-jacket afternoon at 67.2°F to a sweater evening at 51.9°F. Pack layers you can add after dark. A grid cell may soften the desert coast’s sharp day-night swing, so the gap on the ground may be wider than the normals suggest.
On January 15 the day lasts about 10 hours 23 minutes. Sunrise comes at 7:32 a.m. and sunset at 5:54 p.m., Hermosillo time. The light goes soon after 5:54 p.m., and the air heads toward that 51.9°F low, so outdoor dinners call for a layer within reach.
Can you swim in Puerto Penasco in January? Sea temperature
Sea surface off Puerto Penasco averages 62.3°F in January. That figure comes from the Open-Meteo Marine API for 2015-2024 and is a mean of daily maxima, so it runs a shade warmer than a 24-hour average would.
At 62.3°F the water is 4.9°F cooler than the average afternoon air. Sandy Beach (Playa Mirador) and Cholla Bay are both swimming beaches on the Sea of Cortez. In water this cool most people keep swims short, and a wetsuit is what turns a dip into a proper swim.
We found no January wind or swell data for this stretch of the Sea of Cortez, so we cannot say how choppy the water gets. Check a marine forecast on the morning you plan to get in.
How busy is Puerto Penasco in January? Crowds and prices
We found no occupancy series and no monthly room-rate data for Puerto Penasco. We therefore place January in no price ranking and crown no month expensive or cheap. The one calendar comparison we can back is the weather: December and February bracket January with highs of 67.4°F and 68.4°F.
We could not verify how far ahead lodging fills for January, so we give no lead time in weeks. Ask the property directly about your dates and about its cancellation window. Our travel basics cover the general booking questions that apply anywhere.
Sonora’s lodging tax is 3% of revenue under Article 122 of the state’s Ley de Hacienda, in the text published December 26, 2025. We could not verify whether a property quotes it as a separate line or folds it into the nightly rate. Ask which price you are reading.
Nights average 51.9°F, so the one upgrade worth paying for in January is a room with confirmed heating. Ask before you book. We could not verify heating or pool conditions at any specific property, so we name none.
Things to do in Puerto Penasco in January
January is a shoreline month. With highs of 67.2°F and rain on about one day, the outdoor plans are the ones the weather backs, and the long beach walk at midday is the best of them. Swimming days are a smaller part of the picture at 62.3°F.
Sandy Beach (Playa Mirador) and Cholla Bay are the two swimming beaches, both on the Sea of Cortez. Puerto Penasco also sits at the edge of the Alto Golfo de California y Delta del Rio Colorado Biosphere Reserve, decreed a federal protected area on June 10, 1993. It is the critical refuge of the vaquita marina, the world’s most endangered marine mammal, and of the totoaba fish.
Both beaches share the same sea, so the water is 62.3°F at either one. Air is what changes with the hour. We found no January-specific data on wildlife seasons or water clarity, so we promise nothing about what swims past.
We found no verified entry fee or free-access rule for either beach, so we quote none. Confirm locally before you plan a day around a price.
Puerto Penasco itinerary for January
Day one runs on the sun. Start after sunrise at 7:32 a.m., in a layer, at Sandy Beach (Playa Mirador), when the air is closest to the 51.9°F low. Walk the shore as it warms, swim briefly around midday if you want, when the air nears the 67.2°F high, and take a last stroll before the 5:54 p.m. sunset.
Day two moves to Cholla Bay, the other swimming beach, on the same clock. Rain of 0.10 inch or more falls on 1.1 days in the average month, so a wet day is a long shot. If one arrives, hold the beach for the dry stretch. We found no verified indoor attractions with January hours, so we name none.
Puerto Penasco in January vs December and February
| Measure | December | January | February |
|---|---|---|---|
| Average high | 67.4°F | 67.2°F | 68.4°F |
| Average low | 52.7°F | 51.9°F | 53.8°F |
| Precipitation | 0.58 inches | 0.36 inches | 0.53 inches |
| Days with 0.10 inch or more | 1.3 | 1.1 | 1.4 |
| Sea surface (Open-Meteo Marine API, 2015-2024) | 65.4°F | 62.3°F | 62.0°F |
The air barely moves across the three months. January’s average low of 51.9°F is the lowest of the group, against 52.7°F in December and 53.8°F in February. February’s average high runs 1.2°F above January’s, and its average low 1.9°F above. Rain days stay between 1.1 and 1.4 in all three.
Moving back four weeks to December buys water that is 3.1°F warmer, at 65.4°F. Moving ahead to February buys slightly warmer air, but the sea stays at 62.0°F, only 0.3°F under January. The monthly averages blur a shift of a few weeks, so late January and early February will feel much alike.
Is January a good time to visit Puerto Penasco?
Yes, for walkers and beach-sitters who want mild, dry days: 67.2°F afternoons and measurable rain on about one day. No, for anyone whose plan depends on warm-water swimming, because the sea sits at 62.3°F.
If swimming decides it, choose December, with water at 65.4°F. If you are still comparing Puerto Penasco with other places for the same month, our where-to-go-by-month guide lines them up.
In one sentence: January is the driest of the three months at 0.36 inches, against 0.58 in December and 0.53 in February.
The last word
Pack for the evening in January: an afternoon at 67.2°F, a night at 51.9°F, and the sun down by 5:54 p.m. Put the beach in the middle of the day and keep the swim short in 62.3°F water. Then read the U.S. State Department’s Mexico advisory before you book, in the version reissued May 29, 2026, which lists Sonora at Level 3, Reconsider travel, due to terrorism and crime.
Sources & data for this guide
- Temperature, precipitation and rain-day normals, 1991-2020 · Open-Meteo / ECMWF ERA5, computed for the model grid cell over Puerto Penasco · a model reanalysis, not a station record · checked Sep 30, 2026
- Sea surface temperature, 2015-2024, mean of daily maxima · Open-Meteo Marine API · checked Sep 30, 2026
- Daylight, sunrise and sunset on January 15 · sunrise-sunset.org, converted to America/Hermosillo time · checked Sep 30, 2026
- Biosphere reserve decree of June 10, 1993 · CONANP, conanp.gob.mx · checked Sep 30, 2026
- Airport status and border access · local press (Codigo Rojo Cajeme, Ahora Noticias Penasco) · checked Sep 30, 2026
- Sonora lodging tax, Article 122 · Congreso del Estado de Sonora, Ley 9, De Hacienda del Estado de Sonora, published Dec 26, 2025 · checked Sep 30, 2026
- Travel advisory, Sonora Level 3 · U.S. Department of State, Mexico Travel Advisory, reissued May 29, 2026, travel.state.gov · checked Sep 30, 2026
- Beach descriptions and the itinerary are editorial. We found no occupancy series, room-rate data, booking lead time, wind or swell data, or beach entry fees · check operators when you book.