Harlingen, Texas Weather
Fireflies pulse through the magnolias. Day 76 of spring. Read this microseason across nine climate regions →
Harlingen weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Thunderstorm24%—88°77°—
- ThursdayJun 4Showers20%0.27″90°75°+2°
- FridayJun 5Overcast53%—93°76°+3°
- SaturdayJun 6Overcast25%—96°77°+3°
- SundayJun 7Overcast——95°77°-1°
- MondayJun 8Overcast14%—95°77°0°
- TuesdayJun 9Overcast——94°76°-1°
Ozone at AQI 33 now. AQI flat over the last 6 hours (within ±4 points). With UV 5.8 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 18 by mid-afternoon.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 33 now. With UV 5.8 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 18 by mid-afternoon.
- Present
- AQI 33
- UV peak
- 5.8 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 18
PM × Wind × Precip
PM2.5 at 5.7 µg/m³, PM10 at 7.8 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.73
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
The higher the clouds, the finer the weather.
- Moonrise
- 3:40 AM
- Moonset
- 2:12 PM
- In sign
- ♑︎ Capricorn
Fireflies pulse through the magnolias
Harlingen at a glance
- Today vs. normal: 87°F — typical for the season
- Last frost: January 23 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 3, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Harlingen
SPC has placed Harlingen in the General Thunderstorms category for severe thunderstorms today.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.