Pool season · Texas
Missouri City Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Missouri City's pool year: both model windows, the estimated water-temperature curve, and today's live position on the season bar. The detailed checklists live on the opening and closing guides; this page is the calendar you check between them.
Missouri City, TX — 186 swim days a yearThe bar compresses Missouri City's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the February 15–March 8 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 29. Wherever the today marker sits, the nearest color change is your next appointment.
The Missouri City pool calendar
Opening — target February 22
Target February 22; the practical window runs February 15–March 8, and the 7-day mean crosses the 61°F threshold around March 8. Cold-water starts are the cheap ones.
Closing — deadline November 29
Hold the cover until November 19, then winterize by November 29, a week ahead of the December 6 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Missouri City's typical-year water curve: the same EWMA model as the live widget, run on the 1991–2020 normals instead of this week's weather.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 53° | 55° | 60° | 66° | 72° | 79° | 82° | 84° | 82° | 76° | 66° | 58° |
Warmest water typically June–September (peaking near 84°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Mission's pool season and New Braunfels's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Texas season index.
Missouri City pool season FAQ
When should I open my pool in Missouri City, TX?
Open by February 22 — the model places Missouri City's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Missouri City opening guide has the 12-step sequence.
When should I close my pool in Missouri City?
Close by November 29: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Missouri City closing guide sequences the work backward from that date.
How long is the swim season in Missouri City?
Missouri City averages 186 days a year with normal highs of 80°F or better — about 14 days earlier than the Texas median. The Texas season index ranks all 68 covered cities by the same metric.
How warm does pool water get in Missouri City?
An unheated pool near Missouri City typically peaks around 84°F in high summer and bottoms out near 53°F in winter, spending roughly 4 months at or above the 78°F comfort line most swimmers prefer. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
Email me when Missouri City hits the closing window
Data: NOAA 1991–2020 climate normals via Thompsons 3 WSW (8.0 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.