How much rain fell in Houston, TX?
The last 24 hours of rainfall in Houston, Texas: NOAA radar corrected against rain gauges, refreshed hourly, with the label that says how the number was made.
Rain in the last 24 hours, central Houston
0.5 in
24 hours through 11 PM CDT, Oct 1
Provisional: will be revised as gauge data arrives
One hour was revised from 0.3 in as gauge data arrived.
One ~1 km NOAA MRMS grid cell at 29.760, -95.370, not a citywide figure. Rain varies inside a city; a spot a few miles away can read very differently.
Not downtown? Get the number for your own street.
Enter my ZIP codeWant the number for your yard or field instead of downtown? Raindex reads the 1 km cell each saved place sits in, keeps a day-by-day history, and alerts you when a place passes the amount you care about.
Average rainfall in Houston, month by month
30-year normals (1991–2020) from NOAA station Houston Heights, TX (USC00414321), about 4 mi from the point above. Annual normal: 60.5 in.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inches | 4.6 | 3.3 | 4.9 | 4.5 | 6.2 | 6.2 | 4.9 | 5.9 | 5.5 | 5.1 | 5.0 | 4.5 |
| Days ≥ 0.10 in | 6 | 5 | 5 | 4 | 5 | 7 | 6 | 6 | 5 | 5 | 5 | 6 |
Source: NOAA NCEI U.S. Climate Normals, 1991-2020. A normal is a long-run average for a whole month; it is not a forecast, and a month in progress is not comparable with it until the month ends.
Rain in Houston: common questions
What is the average annual rainfall in Houston?
About 60.5 in a year, the 1991–2020 NOAA normal at Houston Heights, TX, about 4 mi from central Houston.
What is the wettest month in Houston?
May, with a normal of 6.2 in at Houston Heights, TX. The driest is February, at 3.3 in.
Why doesn't this match my rain gauge in Houston?
Two reasons usually. Location: this is a single ~1 km cell downtown, and a storm can drop an inch on one side of town and nothing on the other. Method: radar estimates rain from a beam high above the ground, then gets corrected against gauges, and that correction arrives roughly 97 minutes late.
Can I see how much rain fell at my own address in Houston?
Yes. The free Raindex iPhone app reads the ~1 km cell your address sits in and keeps a day-by-day record from the day you save it. For a one-off check, the rainfall lookup takes a ZIP code or your location.
Where these numbers come from
- On this page: 30-year averages
- Every average here is from the NOAA NCEI U.S. Climate Normals, 1991-2020, retrieved 2026-09-29. Each page names the weather station it used and how far away that station is, because a normal measured at an airport is that airport’s, not the whole town’s.
- What Raindex measures
- Raindex measures observed rainfall from NOAA’s Multi-Radar Multi-Sensor system (MRMS) at roughly 1 km resolution, combining radar estimates with rain-gauge adjustment. The gauge-corrected pass runs about 97 minutes behind real time, so a recent total can be revised upward or downward as gauge data arrives.
- What neither one can tell you
- A 30-year average says nothing about this week. A radar estimate is still an estimate: it can disagree with the gauge in your yard because of terrain, the height of the radar beam over your property, how rainfall varies within a single kilometre, and the fact that a gauge itself under-catches in wind. Raindex labels each reading gauge-adjusted, radar only or provisional so you can see which you are looking at. It does not publish an accuracy percentage, because that is not a number this data can honestly support.