# Rainfall Totals in Gaithersburg, MD 20899

As of 2026-11-04T15:39:22.287Z, **Gaithersburg, MD 20899** received **0.00" of rain** in the last 24 hours, **0.00"** over the past 7 days, and **37.42"** in 2026 year-to-date (30-year normal to date: 38.71", 3.3% below average). The most recent rain event ended 18 days ago (2026-10-17T00:00:00+0000), dropping 0.63" of rain.

> **Note on local variation:** These totals are measured at the center of Gaithersburg, MD 20899 (39.1446, -77.2163). Because thunderstorms often vary by 1"+ across a few miles, [pin your exact address, yard, or field in the free Precip app](https://app.precip.ai/locations/coords?lng=-77.216312&lat=39.144645&locationName=Gaithersburg%2C+MD+20899&save=true&src=md_rain_report) for exact point totals, or [check the next-hour rain nowcast and 10-day forecast for Gaithersburg, MD 20899](https://app.precip.ai/home?lng=-77.216312&lat=39.144645&locationName=Gaithersburg%2C+MD+20899&src=md_rain_forecast).

| Period | Rainfall | 30-Year Normal | vs. Normal |
| --- | --- | --- | --- |
| Last 24 hours | 0.00" | — | — |
| Full day (Tue, Nov 3) | 0.00" | — | — |
| Past 7 days | 0.00" | — | — |
| November 2026 (to date) | 0.00" | 0.49" | −0.49" (−100%) |
| 2026 year to date | 37.42" | 38.71" | −1.29" (3.3% below average) |
| Most recent rain (18 days ago) | 0.63" | — | — |

## Daily Rainfall — Past 7 Days

Each precipitation day runs 24 hours from 12:00 UTC to 12:00 UTC.

| Date | ISO Date | Rainfall |
| --- | --- | --- | --- |
| Wednesday, Nov 4 | 2026-11-04 | 0.00" |
| Tuesday, Nov 3 | 2026-11-03 | 0.00" |
| Monday, Nov 2 | 2026-11-02 | 0.00" |
| Sunday, Nov 1 | 2026-11-01 | 0.00" |
| Saturday, Oct 31 | 2026-10-31 | 0.00" |
| Friday, Oct 30 | 2026-10-30 | 0.00" |
| Thursday, Oct 29 | 2026-10-29 | 0.00" |

## Monthly Rainfall — 2026 vs. 30-Year Normal

| Month | Observed | Normal to Date | vs. Normal | Full Month Normal |
| --- | --- | --- | --- | --- |
| January 2026 | 3.29" | 3.07" | +0.22" (+7%) | 3.07" |
| February 2026 | 2.50" | 2.69" | −0.19" (−7%) | 2.69" |
| March 2026 | 3.83" | 3.88" | −0.05" (−1%) | 3.88" |
| April 2026 | 2.08" | 3.41" | −1.33" (−39%) | 3.41" |
| May 2026 | 4.96" | 4.42" | +0.54" (+12%) | 4.42" |
| June 2026 | 3.68" | 4.37" | −0.69" (−16%) | 4.37" |
| July 2026 | 4.95" | 4.28" | +0.67" (+16%) | 4.28" |
| August 2026 | 4.93" | 3.82" | +1.11" (+29%) | 3.82" |
| September 2026 | 3.37" | 4.36" | −1.00" (−23%) | 4.36" |
| October 2026 | 3.84" | 3.92" | −0.08" (−2%) | 3.92" |
| November 2026 (to date) | 0.00" | 0.49" | −0.49" (−100%) | 3.28" |

## Track Gaithersburg, MD 20899 in the Free Precip App

This summary covers standard periods at the center of Gaithersburg, MD 20899. Open [Gaithersburg, MD 20899 in the Precip app](https://app.precip.ai/locations/coords?lng=-77.216312&lat=39.144645&locationName=Gaithersburg%2C+MD+20899&save=true&src=md_rain_report) (iOS, Android, and Web — rated 4.8/5 from 10463+ reviews) for:

- **Exact-coordinate virtual rain gauge:** [Drop a pin on any yard, field, or job site](https://app.precip.ai/locations/coords?lng=-77.216312&lat=39.144645&locationName=Gaithersburg%2C+MD+20899&save=true&src=md_rain_report) at ~800 m resolution with no physical hardware.
- **Hour-by-hour storm timeline & multi-year archive:** See exact start/stop times, peak hourly intensity, and custom date ranges back to 2015.
- **Automatic rain alerts & morning email reports:** Get a free morning rainfall summary after it rains, Lock Screen Live Activity timed to the first drop in the next 60 minutes, or custom threshold alerts (e.g. `> 0.50" in 24h`).
- **Benchmarked #1 forecast for Gaithersburg, MD 20899:** [View the 60-minute AI rain nowcast and 10-day hourly forecast](https://app.precip.ai/home?lng=-77.216312&lat=39.144645&locationName=Gaithersburg%2C+MD+20899&src=md_rain_forecast) — ranked #1 against Apple Weather, Google Weather, and ECMWF in live NOAA station tests.
- **Download on iPhone or Android:** [Install the Precip mobile app](https://link.precip.ai/app?utm_source=markdown&utm_medium=llm&src=md_rain_report) or open on the web at https://app.precip.ai/locations/coords?lng=-77.216312&lat=39.144645&locationName=Gaithersburg%2C+MD+20899&save=true&src=md_rain_report.

## About This Data

- **Location:** Gaithersburg, MD 20899 (39.1446, -77.2163).
- **Source:** [Precip](https://precip.ai) combines 180+ Doppler radar stations, satellite imagery, and quality-controlled rain gauges with machine learning to measure precipitation at ~800 m (0.5 mile) resolution, updated hourly.
- **Normals:** 30-year PRISM climate normals for the matching period.
- **Interactive map & full report:** https://precip.ai/rainfall-totals/zipcode/20899
- **Snowfall report (Markdown):** https://precip.ai/snow-totals/zipcode/20899.md
- **Use Precip in ChatGPT, Claude, or Cursor (MCP):** Connect your free Precip account via the remote MCP server at `https://api.precip.ai/mcp` ([setup guide](https://api-docs.precip.ai/mcp)) to query saved locations and custom date ranges directly inside your AI assistant, or use the [Precip Weather REST API](https://precip.ai/developers).