Oakley, United States experiences average highs of 23°C (73°F) and lows of 11°C (52°F) throughout the year. The climate is relatively dry, with only 4 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.
Oakley, United States Weather & Climate 2026
Monthly climate averages for Oakley, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: May–Oct 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
8.2/10
Best: June, July, August, September, October
UV Index
6
High
Temperature 23°C / 11°C
Feels Like 22°C / 10°C
Rainy Days 4
Rainfall 40 mm
Sunshine 10 h
Humidity 66%
Wind Speed 15 km/h
Dew Point 11°C
Hottest Month
31°C
July
Avg Low16°C
Rain0days
Coldest Month
6°C
January
Avg High15°C
Rain9days
Driest Month
0days
June
Avg High30°C
Avg Low15°C
Windiest Month
20 km/h
June (Gusts 45)
Worst Time to Visit
Consider avoiding January, February, December due to less favorable weather conditions.
Sun Position
Sunrise 05:45
Daylight 14.8h
Sunset 20:32
Live conditions—
Oakley on the map · live conditions
Oakley, United States
- Continent
- Americas
- Country
- United States
- City
- Oakley
- Population
- 39.8K
- Elevation
- 6 m
- Coordinates
- 38.00°, -121.71°
Seasonal Breakdown
Spring
Mar–May
Avg High 22°C
Avg Low 10°C
Rain 5 days/mo
Summer
Jun–Aug
Avg High 31°C
Avg Low 15°C
Rain 0 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 25°C
Avg Low 13°C
Rain 3 days/mo
2/3 best months
Winter
Dec–Feb
Avg High 15°C
Avg Low 6°C
Rain 8 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: 15°C / 6°C . Feb: 17°C / 7°C . Mar: 18°C / 8°C . Apr: 22°C / 10°C . May: 26°C / 12°C . Jun: 30°C / 15°C . Jul: 31°C / 16°C . Aug: 31°C / 16°C . Sep: 30°C / 16°C . Oct: 26°C / 13°C . Nov: 19°C / 9°C . Dec: 14°C / 7°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 107 mm. Feb: 80 mm. Mar: 83 mm. Apr: 25 mm. May: 13 mm. Jun: 1 mm. Jul: 0 mm. Aug: 0 mm. Sep: 2 mm. Oct: 25 mm. Nov: 48 mm. Dec: 94 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 81%. Feb: 72%. Mar: 73%. Apr: 66%. May: 59%. Jun: 55%. Jul: 57%. Aug: 59%. Sep: 60%. Oct: 61%. Nov: 72%. Dec: 80%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 13 km/h . Feb: 15 km/h . Mar: 16 km/h . Apr: 17 km/h . May: 19 km/h . Jun: 20 km/h . Jul: 19 km/h . Aug: 18 km/h . Sep: 16 km/h . Oct: 13 km/h . Nov: 11 km/h . Dec: 11 km/h .
Sunshine
Sunshine
Sunshine: Jan: 7h. Feb: 8h. Mar: 9h. Apr: 11h. May: 13h. Jun: 14h. Jul: 13h. Aug: 13h. Sep: 11h. Oct: 10h. Nov: 8h. Dec: 6h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 5. Apr: UV 7. May: UV 8. Jun: UV 8. Jul: UV 8. Aug: UV 8. Sep: UV 7. Oct: UV 5. Nov: UV 3. Dec: UV 3.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending drier by about 15 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 31°C | Jul · 31°C |
| Coldest month | Jan 2025 · 5°C | Jan · 6°C |
| Wettest month | Feb 2025 · 130 mm | Jan · 107 mm |
| Windiest month | May 2025 · 20 km/h | Jun · 20 km/h |
Month-by-Month Weather Table
January
Fair 
February
Fair March
Good April
Good May
Excellent June best
Excellent July best
Excellent August best
Excellent September best
Excellent October best
Excellent November
Good December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 15°C / 6°C | 13°C / 4°C | 9days (107 mm) Wet | 6.6h Fair | 81% Humid | 2.9 Moderate | Fair | View Details |
| February | 17°C / 7°C | 15°C / 4°C | 7days (80 mm) Good | 8.4h Good | 72% Muggy | 3.7 Moderate | Fair | View Details |
| March | 18°C / 8°C | 17°C / 6°C | 10days (83 mm) Wet | 9.2h Good | 73% Muggy | 5.4 High | Good | View Details |
| April | 22°C / 10°C | 21°C / 8°C | 4days (25 mm) Good | 10.9h Excellent | 66% Muggy | 6.8 High | Good | View Details |
| May | 26°C / 12°C | 25°C / 10°C | 2days (13 mm) Excellent | 12.6h Excellent | 59% Moderate | 7.9 Very High | Excellent | View Details |
| June best | 30°C / 15°C | 30°C / 13°C | 0days (1 mm) Excellent | 13.6h Excellent | 55% Moderate | 8.2 Very High | Excellent | View Details |
| July best | 31°C / 16°C | 31°C / 15°C | 0days (0 mm) Excellent | 13.4h Excellent | 57% Moderate | 8.3 Very High | Excellent | View Details |
| August best | 31°C / 16°C | 31°C / 16°C | 0days (0 mm) Excellent | 12.5h Excellent | 59% Moderate | 7.7 Very High | Excellent | View Details |
| September best | 30°C / 16°C | 29°C / 15°C | 0days (2 mm) Excellent | 11.3h Excellent | 60% Moderate | 6.5 High | Excellent | View Details |
| October best | 26°C / 13°C | 24°C / 12°C | 3days (25 mm) Excellent | 9.7h Good | 61% Muggy | 5 Moderate | Excellent | View Details |
| November | 19°C / 9°C | 17°C / 8°C | 6days (48 mm) Good | 7.9h Good | 72% Muggy | 3.4 Moderate | Good | View Details |
| December | 14°C / 7°C | 13°C / 4°C | 9days (94 mm) Wet | 6.4h Fair | 80% Humid | 2.7 Moderate | Fair | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Oakley are June, July, August, September, October, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Oakley, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Oakley is July, with average daytime highs of 31°C (89°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Oakley is January, with average overnight lows of 6°C (43°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Oakley is January, averaging 107mm of precipitation across 9 rainy days. An umbrella or waterproof jacket is essential.
Oakley receives approximately 123 sunshine hours per year. The sunniest month is June with around 14 hours. Based on climate data for Oakley.
The least favorable months to visit Oakley are January, February, December, primarily due to less favorable weather conditions. For the best conditions, consider June, July, August, September, October instead.
The annual average UV index in Oakley is 6, classified as high. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Oakley is 66%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Average wind speeds in Oakley are 15 km/h (9 mph). The windiest month is June with peak winds reaching 20 km/h (12 mph) (gusts up to 45 km/h / 28 mph).
Oakley averages 11 clear-sky days per month with overall cloud cover around 40%. The clearest skies occur in July.
The annual average dew point in Oakley is 11°C (52°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Oakley has a Hot-Summer Mediterranean climate, classified as Csa under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Oakley ranges from 10°C (50°F) to 22°C (72°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Oakley. It earns a climate score of 9.5/10 with Excellent.
For June in Oakley, pack Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses, Sandals. With average highs of 30°C (86°F) and 0 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.
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