Pasco, United States experiences average highs of 21°C (70°F) and lows of 9°C (48°F) throughout the year. The climate is relatively dry, with only 5 rainy days per month on average. Sunshine is abundant, averaging about 10 hours per day. Average highs have stayed broadly stable across the available records.
Pasco, United States Weather & Climate 2026
Monthly climate averages for Pasco, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Apr–Sep 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
6.4/10
Best: April, May, June, August, September
UV Index
4
Low
Temperature 21°C / 9°C
Feels Like 18°C / 6°C
Rainy Days 5
Rainfall 23 mm
Sunshine 10 h
Humidity 57%
Wind Speed 16 km/h
Dew Point 5°C
Snow Days 3 days
Frost Days 12 days
Hottest Month
37°C
July
Avg Low20°C
Rain0days
Coldest Month
-1°C
January
Avg High6°C
Rain9days
Driest Month
0days
July
Avg High37°C
Avg Low20°C
Windiest Month
19 km/h
April (Gusts 40)
Worst Time to Visit
Consider avoiding January, February, December due to very cold temperatures.
Sun Position
Sunrise 05:05
Daylight 15.8h
Sunset 20:51
Live conditions—
Pasco on the map · live conditions
Pasco, United States
- Continent
- Americas
- Country
- United States
- City
- Pasco
- Population
- 69.5K
- Elevation
- 118 m
- Coordinates
- 46.24°, -119.10°
Seasonal Breakdown
Spring
Mar–May
Avg High 21°C
Avg Low 7°C
Rain 5 days/mo
2/3 best months
Summer
Jun–Aug
Avg High 35°C
Avg Low 19°C
Rain 1 days/mo
2/3 best months
Autumn
Sep–Nov
Avg High 20°C
Avg Low 9°C
Rain 5 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 7°C
Avg Low -1°C
Rain 9 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 6°C / -1°C . Feb: 9°C / -1°C . Mar: 15°C / 3°C . Apr: 20°C / 7°C . May: 27°C / 12°C . Jun: 31°C / 17°C . Jul: 37°C / 20°C . Aug: 36°C / 20°C . Sep: 29°C / 15°C . Oct: 20°C / 8°C . Nov: 12°C / 3°C . Dec: 7°C / 0°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 40 mm. Feb: 32 mm. Mar: 29 mm. Apr: 23 mm. May: 18 mm. Jun: 11 mm. Jul: 1 mm. Aug: 2 mm. Sep: 9 mm. Oct: 30 mm. Nov: 38 mm. Dec: 40 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 82%. Feb: 73%. Mar: 65%. Apr: 50%. May: 42%. Jun: 35%. Jul: 29%. Aug: 34%. Sep: 47%. Oct: 62%. Nov: 78%. Dec: 82%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 13 km/h . Feb: 16 km/h . Mar: 17 km/h . Apr: 19 km/h . May: 18 km/h . Jun: 18 km/h . Jul: 15 km/h . Aug: 15 km/h . Sep: 15 km/h . Oct: 16 km/h . Nov: 15 km/h . Dec: 14 km/h .
Sunshine
Sunshine
Sunshine: Jan: 5h. Feb: 7h. Mar: 9h. Apr: 11h. May: 13h. Jun: 13h. Jul: 14h. Aug: 13h. Sep: 11h. Oct: 9h. Nov: 6h. Dec: 5h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 4. Apr: UV 6. May: UV 7. Jun: UV 7. Jul: UV 7. Aug: UV 6. Sep: UV 5. Oct: UV 4. Nov: UV 2. Dec: UV 1.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 3 days. Feb: 5 days. Mar: 1 days. Apr: 0 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 1 days. Dec: 4 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 37°C | Jul · 37°C |
| Coldest month | Jan 2025 · -2°C | Jan · -1°C |
| Wettest month | Dec 2025 · 58 mm | Jan · 40 mm |
| Windiest month | Dec 2025 · 19 km/h | Apr · 19 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Fair April best
Excellent May best
Excellent June best
Excellent July
Good August best
Excellent September best
Excellent October
Good November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 6°C / -1°C | 3°C / -5°C | 9days (40 mm) Wet | 5.3h Fair | 82% Humid | 1.8 Low | Poor | View Details |
| February | 9°C / -1°C | 6°C / -4°C | 8days (32 mm) Wet | 7h Good | 73% Muggy | 2.5 Moderate | Poor | View Details |
| March | 15°C / 3°C | 11°C / 0°C | 7days (29 mm) Good | 9h Good | 65% Muggy | 4.2 Moderate | Fair | View Details |
| April best | 20°C / 7°C | 17°C / 4°C | 5days (23 mm) Good | 11h Excellent | 50% Moderate | 5.7 High | Excellent | View Details |
| May best | 27°C / 12°C | 25°C / 10°C | 4days (18 mm) Good | 12.5h Excellent | 42% Moderate | 6.6 High | Excellent | View Details |
| June best | 31°C / 17°C | 30°C / 15°C | 2days (11 mm) Excellent | 13.3h Excellent | 35% Comfortable | 7.1 Very High | Excellent | View Details |
| July | 37°C / 20°C | 35°C / 20°C | 0days (1 mm) Excellent | 13.9h Excellent | 29% Comfortable | 7.3 Very High | Good | View Details |
| August best | 36°C / 20°C | 34°C / 20°C | 1days (2 mm) Excellent | 12.5h Excellent | 34% Comfortable | 6.4 High | Excellent | View Details |
| September best | 29°C / 15°C | 27°C / 14°C | 2days (9 mm) Excellent | 10.8h Excellent | 47% Moderate | 5.1 High | Excellent | View Details |
| October | 20°C / 8°C | 17°C / 6°C | 6days (30 mm) Good | 8.5h Good | 62% Muggy | 3.5 Moderate | Good | View Details |
| November | 12°C / 3°C | 9°C / 0°C | 8days (38 mm) Wet | 6.3h Fair | 78% Humid | 2 Low | Poor | View Details |
| December | 7°C / 0°C | 3°C / -4°C | 10days (40 mm) Wet | 4.8h Fair | 82% Humid | 1.4 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Pasco are April, May, June, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Pasco, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Pasco is July, with average daytime highs of 37°C (98°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Pasco is January, with average overnight lows of -1°C (30°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Pasco is January, averaging 40mm of precipitation across 9 rainy days. An umbrella or waterproof jacket is essential.
Pasco receives approximately 115 sunshine hours per year. The sunniest month is July with around 14 hours. Based on climate data for Pasco.
The least favorable months to visit Pasco are January, February, December, primarily due to very cold temperatures. For the best conditions, consider April, May, June, August, September instead.
The annual average UV index in Pasco is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Pasco is 57%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Pasco receives snow. Months with snowfall average 3 snow days and 4 cm (2 in) of accumulation, with about 12 frost days during winter.
Average wind speeds in Pasco are 16 km/h (10 mph). The windiest month is April with peak winds reaching 19 km/h (12 mph) (gusts up to 40 km/h / 25 mph).
Pasco averages 7 clear-sky days per month with overall cloud cover around 51%. The clearest skies occur in July.
The annual average dew point in Pasco is 5°C (41°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Pasco has a Cold Semi-Arid climate, classified as BSk under the Köppen system. Arid climates have very low rainfall relative to temperature, with large swings between daytime heat and cool nights.
The 'feels like' temperature in Pasco ranges from 6°C (43°F) to 18°C (64°F) on average. Wind chill makes winters feel noticeably colder than the actual temperature — layered clothing is recommended.
Yes, June is a great time to visit Pasco. It earns a climate score of 9.8/10 with Excellent.
For June in Pasco, pack Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses, Sandals. With average highs of 31°C (89°F) and 2 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
Last updated: