Paso Robles, California climate: Normal weather by month, frost dates and records
Paso Robles's normal year runs from 33°F December nights to 94°F August afternoons, with 12.2 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 15.6°C, December lows of 1°C, August highs of 34°C, 309 mm of precipitation a year.
- NOAA stationPaso Robles Municipal Airport
- Station IDUSW00093209
- Location35.67°N 120.63°W
- Elevation810 ft (247 m)
- Population31,568
On October 23, the normal high in Paso Robles is 78°F and the normal low 42°F, and the chance of measurable rain or snow is 8%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Paso Robles.
- Jan 61° 35°
- Feb 63° 37°
- Mar 68° 40°
- Apr 74° 41°
- May 81° 46°
- Jun 89° 50°
- Jul 93° 54°
- Aug 94° 53°
- Sep 90° 50°
- Oct 81° 44°
- Nov 69° 37°
- Dec 60° 33°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Paso Robles each month?
August is the warmest month, with normal highs of 94°F; December the coldest, with normal lows of 33°F. The most precipitation falls in January (2.74 in), the least in August (0.01 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 61°F | 35°F | 48.1°F | 2.74 | 7 | <1 | 11 | 10 h |
| February | 63°F | 37°F | 50.1°F | 2.48 | 8 | <1 | 7 | 10 h 50 min |
| March | 68°F | 40°F | 53.5°F | 2.42 | 7 | <1 | 3 | 11 h 50 min |
| April | 74°F | 41°F | 57.2°F | 0.60 | 4 | 2 | 2 | 13 h |
| May | 81°F | 46°F | 63.3°F | 0.31 | 2 | 7 | <1 | 14 h |
| June | 89°F | 50°F | 69.1°F | 0.04 | 1 | 16 | <1 | 14 h 30 min |
| July | 93°F | 54°F | 73.4°F | 0.08 | <1 | 21 | <1 | 14 h 20 min |
| August | 94°F | 53°F | 73.6°F | 0.01 | <1 | 23 | <1 | 13 h 30 min |
| September | 90°F | 50°F | 70.0°F | 0.06 | 1 | 17 | <1 | 12 h 30 min |
| October | 81°F | 44°F | 62.1°F | 0.56 | 2 | 6 | 1 | 11 h 20 min |
| November | 69°F | 37°F | 52.9°F | 0.87 | 4 | <1 | 7 | 10 h 20 min |
| December | 60°F | 33°F | 46.8°F | 1.98 | 7 | <1 | 15 | 9 h 50 min |
| Year (annual) | 77°F | 43°F | 60.0°F | 12.15 | 43 | 92 | 45 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 16°C | 2°C | 8.9°C | 70 mm |
| February | 17°C | 3°C | 10.1°C | 63 mm |
| March | 20°C | 4°C | 11.9°C | 61 mm |
| April | 23°C | 5°C | 14.0°C | 15 mm |
| May | 27°C | 8°C | 17.4°C | 8 mm |
| June | 31°C | 10°C | 20.6°C | 1 mm |
| July | 34°C | 12°C | 23.0°C | 2 mm |
| August | 34°C | 12°C | 23.1°C | 0 mm |
| September | 32°C | 10°C | 21.1°C | 2 mm |
| October | 27°C | 6°C | 16.7°C | 14 mm |
| November | 20°C | 3°C | 11.6°C | 22 mm |
| December | 16°C | 1°C | 8.2°C | 50 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00093209; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Paso Robles?
Normal highs sit between 65°F and 85°F in March, April, May, October and November. Of those, May has the fewest days with rain (2).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00093209.
When is the last frost in Paso Robles?
In Paso Robles, the last spring frost (32°F) comes after April 4 in half of years and after April 27 in one year in ten; the first autumn frost comes before November 5 in half of years and before October 17 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 41 year in 10 after April 27; 9 in 10 after March 2
- First autumn frost, half of years before
- November 51 year in 10 before October 17; 9 in 10 before November 24
NOAA puts the median frost-free season at 213 days, and the season without a hard freeze (28°F) at 274 days.
A hard freeze (28°F) comes after February 22 in half of springs and before November 21 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Paso Robles in zone 9a in ZIP code 93446, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Paso Robles's NOAA station is in zone 9a: the coldest night of a typical year reaches 22°F (30 complete years).
Frost dates for every NOAA station in California · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00093209; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Paso Robles?
In a normal year in Paso Robles, 92 days a year reach 90°F (29 of them 100°F or more), 45 nights fall to 32°F or colder and 43 days bring measurable precipitation.
- Days at 90°F or more
- 92a normal year
- Days at 100°F or more
- 29a normal year
- Nights at 32°F or colder
- 45a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 43a normal year
The highest temperature in this station's record (since 1952) is 117°F, on September 6, 2020; the lowest is 8°F, on December 23, 1990.
The wettest calendar year on that record is 1995, with 25.56 in; the snowiest season is 1988–89, with 4.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00093209; records: ACIS (NOAA Regional Climate Centers), station USW00093209. Records use complete months only; a month missing more than three days is left out.
How humid and windy is Paso Robles, and how clear are its skies?
The summer (June-August) dew point averages 49°F. The muggiest month is July, with an average dew point of 50°F; the driest air comes in December (36°F). May is the windiest month (9.2 mph on average), and August has the most clear or nearly clear hours (92%).
| Month | Dew point | Humidity | Afternoon humidity | Wind | Clear or few clouds | Overcast |
|---|---|---|---|---|---|---|
| January | 40°F | 76% | 48% | 4.9 mph | 66% | 22% |
| February | 41°F | 73% | 47% | 5.7 mph | 62% | 22% |
| March | 42°F | 67% | 38% | 6.8 mph | 72% | 16% |
| April | 43°F | 56% | 29% | 8.0 mph | 76% | 12% |
| May | 46°F | 55% | 28% | 9.2 mph | 82% | 10% |
| June | 48°F | 50% | 23% | 8.7 mph | 92% | 5% |
| July | 50°F | 51% | 23% | 7.8 mph | 90% | 6% |
| August | 48°F | 49% | 20% | 6.7 mph | 92% | 4% |
| September | 45°F | 51% | 23% | 5.7 mph | 88% | 7% |
| October | 40°F | 58% | 29% | 4.7 mph | 80% | 11% |
| November | 37°F | 68% | 39% | 4.7 mph | 74% | 15% |
| December | 36°F | 71% | 45% | 4.8 mph | 67% | 21% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00093209. Monthly averages of all hours; afternoon humidity at 3 p.m. local standard time; sky as the share of hours NOAA's observations rate clear or few clouds (a dash where NOAA publishes no sky value).
How sunny is Paso Robles?
Over a year 90% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Paso Robles, 5.5 kWh per square metre a day. June is the sunniest month (95%) and December the cloudiest (80%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 81% | 2.9 |
| February | 81% | 3.8 |
| March | 84% | 5.2 |
| April | 87% | 6.6 |
| May | 91% | 7.7 |
| June | 95% | 8.3 |
| July | 94% | 8.0 |
| August | 95% | 7.3 |
| September | 95% | 6.2 |
| October | 91% | 4.6 |
| November | 86% | 3.3 |
| December | 80% | 2.6 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Paso Robles need?
A normal year in Paso Robles brings 2,760 heating degree days, 49% fewer than the median U.S. place (5,373), and 959 cooling degree days, 6% more than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,015 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 526 | 0 |
| February | 417 | 0 |
| March | 357 | 0 |
| April | 243 | 7 |
| May | 108 | 56 |
| June | 26 | 150 |
| July | 4 | 264 |
| August | 2 | 269 |
| September | 20 | 170 |
| October | 131 | 41 |
| November | 366 | 1 |
| December | 563 | 0 |
| Year (annual) | 2,760 | 959 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00093209. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Paso Robles been warmer than normal lately?
2025 averaged 60.7°F, 0.7°F above the 1991-2020 normal of 60.0°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 61.8°F | +1.8°F | 12.87 |
| 2022 | 61.8°F | +1.8°F | 8.21 |
| 2023 | 59.8°F | −0.2°F | 20.57 |
| 2024 | 61.2°F | +1.2°F | 14.24 |
| 2025 | 60.7°F | +0.7°F | 13.19 |
Over 70 complete years from 1953 to 2025, the station's annual mean temperature rose at a fitted 4.5°F per century (+0.25°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USW00093209; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Paso Robles's climate compare?
Paso Robles is warmer than 95 of the other 218 places with their own NOAA record in California, and wetter than 66. Across the 7,247 U.S. stations with normals, its annual mean of 60.0°F is warmer than 75%.
In the Köppen classification computed from these normals, Paso Robles is BSk: cold semi-arid steppe. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Paso Robles share this climate record?
7 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Templeton, CA8,608 people · 9 mi SW
- Lake Nacimiento, CA3,464 people · 14 mi W
- San Miguel, CA2,956 people · 7 mi NW
- Shandon, CA1,042 people · 14 mi E
- Whitley Gardens, CA101 people · 7 mi E
- Bradley, CA83 people · 17 mi NW
- Creston, CA0 people · 12 mi SE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Paso Robles's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Paso Robles. This page uses Paso Robles Municipal Airport; the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Paso Robles station USC00046730 | 4 mi SW | 730 ft | 59.7°F | 34°F | 91°F | 15.3 | 0 | March 15 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Paso Robles's climate
What is the coldest month in Paso Robles?
December, with a normal high of 60°F and a normal low of 33°F. The warmest is August (94°F by day, 53°F at night).
Does it snow in Paso Robles?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in Paso Robles?
January, with 2.74 in of precipitation in a normal year; the driest is August with 0.01 in.
What plant hardiness zone is Paso Robles in?
The USDA's 2023 map puts Paso Robles in zone 9a in ZIP code 93446, the nearest ZIP area. By the same method at Paso Robles's NOAA station, the coldest night of a typical year reaches 22°F (30 years, 1991-2020): zone 9a.
How late can frost come in Paso Robles?
In half of years the last 32°F night comes after April 4; in one year in ten it comes after April 27. Waiting until April 27 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Paso Robles in OctoberThis month day by day, its records and recent years
- California climateThe statewide normals and every place in the state
- Morro Bay, CA24 miles from this station, 59.5°F a year
- San Luis Obispo Poly, CA25 miles from this station, 60.5°F a year
- San Luis Obispo, CA30 miles from this station, 59.7°F a year
- Hearst Castle, CA30 miles from this station, 59.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made