Petronila’s winters are milder and less snowy than most of the U.S.
A typical July afternoon reaches 95°, a January night drops to 47°, and snow is almost unheard of.
A year in Petronila at a glance
Each month’s typical high and low, and what it brings.
What stands out about Petronila’s climate
Compared with towns across the U.S., with Petronila’s place in Texas beside it.
What a year in Petronila feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
A freeze most winters
Frost and day counts come from NOAA’s station at Corpus Christi, TX, 11 miles from the town’s center, at about the same height.
The 2023 USDA map puts Petronila’s center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 29°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 29 inches of rain a year
September is the wettest month and February the driest. Rain falls on about 72 days a year. Snow is rare: about 0.2" in a normal year at Robstown, TX, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Petronila
18% of the work is heating, so air conditioning is the bigger bill. No month averages under 55°.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Corpus Christi, TX.
Living with Petronila’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 9b. Frost comes about 9 winters in 10, so tender plants can often stay out through winter.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, November and December.
Parks & trails →Of the yearly building losses FEMA expects in Petronila from natural hazards, hurricanes are the largest share (33%); heat waves, cold waves, winter storms and ice storms together are 11%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Petronila and similar climates
TownRatings has no climate map of the towns around Petronila yet.
Climates most like Petronila’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Petronila, TX | 47° | 95° | 29" | 0.2" |
| Chico, CA | 38° | 96° | 31" | 0.0" |
| Grants Pass, OR | 34° | 90° | 33" | 0.9" |
| Corona de Tucson, AZ | 36° | 96° | 14" | 0.1" |
| Lawton, OK | 29° | 96° | 32" | 1.8" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Petronila averaged 1.8° warmer than the 1900s. The biggest change is in February (+3.0°).
A bigger shift than in 81% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Petronila compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Petronila’s place among Texas’.
Petronila weather by month
Highs, lows and precipitation from NOAA’s grid at Petronila’s center; snow, wet days and snow on the ground from Robstown, TX. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 69° | 47° | 1.4" | 0.0" | 7 | 0 | 53° – 63° |
| February | 73° | 52° | 1.4" | 0.0" | 7 | 0 | 55° – 71° |
| March | 78° | 58° | 2.0" | 0.0" | 7 | 0 | 61° – 75° |
| April | 84° | 63° | 1.7" | 0.0" | 6 | 0 | 69° – 78° |
| May | 89° | 70° | 3.3" | 0.0" | 5 | 0 | 75° – 83° |
| June | 94° | 75° | 3.3" | 0.0" | 5 | 0 | 82° – 87° |
| July | 95° | 75° | 2.3" | 0.0" | 5 | 0 | 82° – 88° |
| August | 96° | 75° | 2.4" | 0.0" | 5 | 0 | 83° – 88° |
| September | 92° | 72° | 5.1" | 0.0" | 9 | 0 | 79° – 85° |
| October | 86° | 64° | 3.0" | 0.0" | 6 | 0 | 72° – 80° |
| November | 77° | 55° | 1.9" | 0.0" | 6 | 0 | 61° – 72° |
| December | 70° | 49° | 1.6" | 0.2" | 6 | 0 | 53° – 63° |
| Year | 83° | 63° | 29.4" | 0.2" | 72 | 0 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 55° to 71°. August is the most reliable, staying within 5°.
Where Petronila’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Petronila’s center.
- Snow: Robstown, TX.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Corpus Christi, TX, 11 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Petronila’s climate
What is the weather like in Petronila?
A typical July afternoon reaches 95°, a January night drops to 47°, and snow is almost unheard of. Milder January nights than 95% of U.S. towns; hotter July afternoons than 95% of U.S. towns.
How cold does it get in Petronila in winter?
January nights average 47°. About 4 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 53°.
How much snow does Petronila get?
About 0.2 inches in a normal winter at Robstown, TX, so most winters see none.
How hot does it get in Petronila?
July, with a typical high of 95° and a low of 75°. About 123 days a year reach 90° and 4 reach 100° (Corpus Christi, TX).
When is the first and last frost in Petronila?
There is no reliable frost date: a 32° night comes in about 89% of winters at Corpus Christi, TX, so most years bring a freeze but some pass without one.
What growing zone is Petronila in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 29°.
What is the best time of year to visit Petronila?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Petronila getting warmer?
Yes: 1991–2020 averaged 1.8° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 81% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Petronila.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.