Photo: Daniel Ziegler · CC BY-SA 4.0Jonestown reaches 100° on about 24 days a year, more than 97% of U.S. towns
The depth of winter brings overnight lows near 37°. By January nights alone, it runs milder than 85% of U.S. towns. February has warmed most since 1901–2000, part of a 1.0° rise. Seedlings are safe outdoors from about March 11, with the first autumn frost due around November 20.
A year in Jonestown at a glance
Each month’s typical high and low, and what it brings.
What stands out about Jonestown’s climate
Compared with towns across the U.S., with Jonestown’s place in Texas beside it.
What a year in Jonestown feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 254 frost-free days a year
In half of years the last 32° night comes by March 11 and the first by November 20. Frost and day counts come from NOAA’s station at Austin Great Hills, TX, 11 miles from the town’s center, at about the same height.
The 2023 USDA map puts Jonestown’s center in zone 9a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 21°. 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 34 inches of rain a year
May is the wettest month and July the driest. Rain falls on about 84 days a year. Snow is rare: about 0.0" in a normal year at Georgetown Lake, TX, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Jonestown
41% of the work is heating, so air conditioning is the bigger bill. Months averaging under 55° run from December through February.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Austin Great Hills, TX.
Living with Jonestown’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
254 frost-free days in zone 9a. The last frost comes by Mar 11 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 20.
Months with highs of 62–84° and lows of 40° or more: February, March, April, October and November. 3.3 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Jonestown from natural hazards, river flooding is the largest share (80%); heat waves, cold waves, winter storms and ice storms together are 3%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Jonestown and its neighbors
Every town next door is within a degree of Jonestown in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Jonestown’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 |
|---|---|---|---|---|
| Jonestown, TX | 37° | 96° | 34" | 0.0" |
| Chico, CA | 38° | 96° | 31" | 0.0" |
| Lawton, OK | 29° | 96° | 32" | 1.8" |
| Grants Pass, OR | 34° | 90° | 33" | 0.9" |
| Cayce, SC | 35° | 93° | 46" | 1.2" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Jonestown averaged 1.0° warmer than the 1900s. The biggest change is in February (+1.9°).
A smaller shift than in 79% 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 Jonestown compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Jonestown’s place among Texas’.
Jonestown weather by month
Highs, lows and precipitation from NOAA’s grid at Jonestown’s center; snow, wet days and snow on the ground from Georgetown Lake, TX. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 62° | 37° | 2.2" | 0.0" | 7 | 0 | 45° – 56° |
| February | 66° | 42° | 2.1" | 0.0" | 7 | 0 | 45° – 62° |
| March | 72° | 49° | 2.7" | 0.0" | 9 | 0 | 53° – 66° |
| April | 79° | 55° | 2.6" | 0.0" | 7 | 0 | 62° – 73° |
| May | 86° | 64° | 4.5" | 0.0" | 8 | 0 | 71° – 80° |
| June | 92° | 70° | 3.3" | 0.0" | 7 | 0 | 77° – 85° |
| July | 96° | 73° | 2.0" | 0.0" | 5 | 0 | 79° – 88° |
| August | 97° | 72° | 2.3" | 0.0" | 5 | 0 | 80° – 90° |
| September | 90° | 67° | 3.4" | 0.0" | 6 | 0 | 74° – 85° |
| October | 81° | 57° | 3.8" | 0.0" | 7 | 0 | 66° – 74° |
| November | 70° | 47° | 2.7" | 0.0" | 8 | 0 | 53° – 64° |
| December | 63° | 39° | 2.3" | 0.0" | 8 | 0 | 44° – 54° |
| Year | 80° | 56° | 33.7" | 0.0" | 84 | 0 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 45° to 62°. June is the most reliable, staying within 8°.
Where Jonestown’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 Jonestown’s center.
- Snow: Georgetown Lake, TX.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Austin Great Hills, 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 Jonestown’s climate
What is the weather like in Jonestown?
A typical July afternoon reaches 96°, a January night drops to 37°, and snow is almost unheard of. Milder January nights than 85% of U.S. towns; hotter July afternoons than 97% of U.S. towns.
How cold does it get in Jonestown in winter?
January nights average 37°. About 27 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 45°.
How much snow does Jonestown get?
About 0.0 inches in a normal winter at Georgetown Lake, TX, so most winters see none.
How hot does it get in Jonestown?
July, with a typical high of 96° and a low of 73°. About 114 days a year reach 90° and 24 reach 100° (Austin Great Hills, TX).
When is the first and last frost in Jonestown?
In half of years the last spring frost (32°) comes by March 11 and the first fall frost by November 20, about 254 frost-free days, at Austin Great Hills, TX.
What growing zone is Jonestown in?
Zone 9a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 21°.
What is the best time of year to visit Jonestown?
By one simple rule (highs of 62–84° and lows of 40° or more), February, March, April, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Jonestown getting warmer?
Yes: 1991–2020 averaged 1.0° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 79% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Jonestown.
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.