Photo: Renelibrary · CC BY-SA 4.0Bertram reaches 100° on about 12 days a year, more than 92% of U.S. towns
January nights here settle around 37°. A year here swings 59° from midwinter lows to midsummer highs. Winters are mild: January nights here are milder than in 84% of U.S. towns. Keep the boiler serviced for the months from December to January, which average under 50°.
A year in Bertram at a glance
Each month’s typical high and low, and what it brings.
What stands out about Bertram’s climate
Compared with towns across the U.S., with Bertram’s place in Texas beside it.
What a year in Bertram feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 262 frost-free days a year
In half of years the last 32° night comes by March 6 and the first by November 23. Day counts come from NOAA’s station at Austin 33 Nw, TX, 8 miles from the town’s center, 110 ft higher; frost dates and degree days from Burnet Muni Airport, 10 miles away.
The 2023 USDA map puts Bertram’s center in zone 8b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 19°. 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 33 inches of rain a year
May is the wettest month and January the driest. Rain falls on about 66 days a year. Snow is rare: about 0.1" in a normal year at Bertram 3 Ene, TX, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Bertram
40% 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 Burnet Muni Airport.
Living with Bertram’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
262 frost-free days in zone 8b. The last frost comes by Mar 6 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 23.
Months with highs of 62–84° and lows of 40° or more: February, March, April, October and November. 0.1 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Bertram from natural hazards, river flooding is the largest share (34%); heat waves, cold waves, winter storms and ice storms together are 19%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Bertram and similar climates
TownRatings has no climate map of the towns around Bertram yet.
Climates most like Bertram’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 |
|---|---|---|---|---|
| Bertram, TX | 37° | 95° | 33" | 0.1" |
| Chico, CA | 38° | 96° | 31" | 0.0" |
| Lawton, OK | 29° | 96° | 32" | 1.8" |
| Grants Pass, OR | 34° | 90° | 33" | 0.9" |
| Lugoff, SC | 33° | 92° | 43" | 0.4" |
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 Bertram averaged 0.9° warmer than the 1900s. The biggest change is in January (+1.6°).
A smaller shift than in 87% 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 Bertram compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Bertram’s place among Texas’.
Bertram weather by month
Highs, lows and precipitation from NOAA’s grid at Bertram’s center; snow, wet days and snow on the ground from Bertram 3 Ene, TX. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 60° | 37° | 2.0" | 0.0" | 5 | 0 | 44° – 55° |
| February | 64° | 41° | 2.1" | 0.1" | 6 | 0 | 44° – 60° |
| March | 71° | 48° | 2.9" | 0.0" | 6 | 0 | 53° – 65° |
| April | 78° | 54° | 2.5" | 0.0" | 6 | 0 | 61° – 72° |
| May | 85° | 63° | 4.5" | 0.0" | 8 | 0 | 69° – 79° |
| June | 92° | 70° | 3.4" | 0.0" | 5 | 0 | 76° – 85° |
| July | 95° | 72° | 2.0" | 0.0" | 4 | 0 | 79° – 88° |
| August | 96° | 72° | 2.3" | 0.0" | 5 | 0 | 79° – 89° |
| September | 89° | 66° | 3.1" | 0.0" | 5 | 0 | 73° – 83° |
| October | 80° | 56° | 3.6" | 0.0" | 6 | 0 | 65° – 73° |
| November | 69° | 46° | 2.7" | 0.0" | 5 | 0 | 51° – 63° |
| December | 62° | 38° | 2.2" | 0.0" | 5 | 0 | 43° – 53° |
| Year | 78° | 55° | 33.3" | 0.1" | 66 | 0 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 44° to 60°. June is the most reliable, staying within 8°.
Where Bertram’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 Bertram’s center.
- Snow: Bertram 3 Ene, TX.
- Frost dates, heating and cooling: Burnet Muni Airport, 10 miles away.
- Freezing nights, 90° and 100° days: Austin 33 Nw, TX, 8 miles from the town’s center, 110 ft higher; 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 Bertram’s climate
What is the weather like in Bertram?
A typical July afternoon reaches 95°, a January night drops to 37°, and snow is almost unheard of. Milder January nights than 84% of U.S. towns; hotter July afternoons than 95% of U.S. towns.
How cold does it get in Bertram in winter?
January nights average 37°. About 20 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 44°.
How much snow does Bertram get?
About 0.1 inches in a normal winter at Bertram 3 Ene, TX, so most winters see none.
How hot does it get in Bertram?
July, with a typical high of 95° and a low of 72°. About 102 days a year reach 90° and 12 reach 100° (Burnet Muni Airport).
When is the first and last frost in Bertram?
In half of years the last spring frost (32°) comes by March 6 and the first fall frost by November 23, about 262 frost-free days, at Burnet Muni Airport.
What growing zone is Bertram in?
Zone 8b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 19°.
What is the best time of year to visit Bertram?
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 Bertram getting warmer?
Yes: 1991–2020 averaged 0.9° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 87% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Bertram.
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.