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State park

Palomar Mountain State Park

California

About

Palomar Mountain State Park is a California State Parks unit in the Palomar Ranger District of Cleveland National Forest, about 8 miles from the town of Aguanga. It sits at a high elevation, and the nearby Palomar Mtn Obsy weather station, at about 5,550 feet, records typical averages that help plan a visit. Spring and fall are the most comfortable times to go. Typical averages from that station show May and October highs around 69°F, while July and August average about 84°F. Winter brings highs near 51°F and a few snowy days a month. Several campgrounds and trails lie within a couple of miles. Crestline Group Campground and Observatory Campground are both about 2 miles away, and the Fry Creek hike starts a little farther out. Paddlers can reach the San Luis Rey River, about 6 miles away.

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Location

Palomar Mountain State Park

California

Data source: State park agencies

Facts about this place

When to go

Best time to go: Apr–Oct. The mildest months here, with typical highs of 61–84°F and lows of 42–65°F.

Typical monthly averages (not a forecast) from the Palomar Mtn Obsy, CA weather station, 3.1 mi away. High / low in °F, and days with snow.

  1. Jan51° high37° low1 days with snow
  2. Feb51° high36° low2 days with snow
  3. Mar56° high39° low1 days with snow
  4. Apr61° high42° low1 days with snow
  5. May69° high48° low
  6. Jun79° high57° low
  7. Jul84° high64° low
  8. Aug84° high65° low
  9. Sep79° high60° low
  10. Oct69° high51° low
  11. Nov58° high43° low
  12. Dec51° high37° low1 days with snow

The station sits about 1,100 ft higher than this spot, so expect it to run a little warmer here.

Source: NOAA NCEI U.S. Climate Normals 1991–2020

Where it is

Nearest town
Aguanga, California · 8.2 mi

Source: USFS EDW boundaries; USGS GNIS populated places

Conditions

Active alerts for Cleveland National Forest as of Oct 9, 2026:

Source: USFS forest alerts

Nearby

Source: Roamze catalog (indexable pages within 10 miles, PostGIS distance)

Is Palomar Mountain State Park open right now?

Closure in the area

There's a closure order in Cleveland National Forest. It doesn't name Palomar Mountain State Park, so check the source for the area it covers.

As of · Source: USFS · Cleveland National Forest. Agencies don't list every closure — check before you go.

Best time to visit Palomar Mountain State Park

Best months: March–November. Best months have typical highs of 55–85 °F, lows of 30 °F or warmer (32 °F where the station doesn't record snow), at most one snowy day and no more than 12 wet days.

  1. Jan

    51° / 37°

    7 wet · 1 snow

  2. Feb

    51° / 36°

    7 wet · 2 snow

  3. Mar

    56° / 39°

    6 wet · 1 snow

  4. Apr

    61° / 42°

    4 wet · 1 snow

  5. May

    69° / 48°

    2 wet

  6. Jun

    79° / 57°

    1 wet

  7. Jul

    84° / 64°

    1 wet

  8. Aug

    84° / 65°

    1 wet

  9. Sep

    79° / 60°

    1 wet

  10. Oct

    69° / 51°

    2 wet

  11. Nov

    58° / 43°

    4 wet

  12. Dec

    51° / 37°

    6 wet · 1 snow

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Palomar Mtn Obsy, CA, 3.1 mi away at 5,550 ft. The station sits about 1,100 ft higher than this place, so expect it a little warmer here. Source: NOAA NCEI U.S. Climate Normals 1991–2020.