Mr. Chilly icon
Mr. Chilly: Comprehensive Review of San Francisco's Hyperlocal Weather App

by Alexander Chia

4.9
IOSWeather
Mr. Chilly delivers precise microclimate weather data for San Francisco and Bay Area residents. The app provides neighborhood-specific forecasts, temperature heatmaps, and real-time conditions for informed daily planning.

Detailed Review

Mr. Chilly addresses San Francisco's notorious microclimate variations through a specialized weather application that provides hyperlocal meteorological data. Developed by Alexander Chia, this iOS-exclusive application serves a specific geographic niche with precision, offering residents and visitors detailed atmospheric information across the city's distinct neighborhoods and broader Bay Area regions. The application's core functionality revolves around dynamic temperature heatmaps that visually represent microclimate variations across San Francisco. Users can access accurate hourly forecasts for the next 24 hours, view day/night cycle representations, and zoom between neighborhood-level details and regional overviews. The interface allows for quick comparisons between locations like Ocean Beach and Half Moon Bay, or checking conditions at Dolores Park before outdoor activities. User experience demonstrates thoughtful design with a simple, intuitive interface that loads rapidly according to multiple user reports. The clean visual presentation combines functional data display with aesthetic appeal, making frequent consultation practical for daily use. Real-world usage patterns show consistent engagement for outfit planning, activity scheduling, and understanding temperature differentials between home and destination neighborhoods. User feedback trends overwhelmingly positive, with a 4.87/5 rating reflecting satisfaction across multiple dimensions. Reviewer Jimgreer (August 3, 2025) noted 'accurate data, simple UI, and loads super fast' while BillBergstrom (April 17, 2025) reported daily use for wardrobe decisions. Multiple users including gerickso7 (August 27, 2025) have requested fog overlay features, indicating active feature development interest. The application excels in its specialized niche with exceptional data accuracy and interface responsiveness. Limitations include geographic restriction to the Bay Area and iOS platform exclusivity. Ideal for San Francisco residents requiring precise microclimate information for daily planning, though less relevant for users outside the coverage area or Android device owners.

Key Features

  • Dynamic temperature heatmaps visually display microclimate variations across San Francisco neighborhoods and Bay Area regions
  • Accurate hourly forecasts provide reliable weather predictions for the next 24 hours with neighborhood-specific precision
  • Zoom functionality enables seamless transition between hyperlocal microclimate views and broader regional weather patterns
  • Day/night cycle representation helps users anticipate temperature changes and atmospheric conditions throughout daily cycles
  • Location comparison capability allows quick weather assessment between different San Francisco neighborhoods and Bay Area towns

Why Users Love It

Exceptional microclimate accuracy
Rapid loading interface

Perfect for: San Francisco residents and Bay Area visitors requiring precise local weather data

Screenshots

Mr. Chilly screenshot 1Mr. Chilly screenshot 2Mr. Chilly screenshot 3Mr. Chilly screenshot 4Mr. Chilly screenshot 5

User Reviews

factualy true
Nov 4, 2022

I love this app so much. Most accurate weather app for SF hands down. Now that IOS 16 is out can you add a widget for the Lock Screen so you don’t have to always open the app? Add a widget for the Lock Screen for the new IOS I love this app so much. Most accurate weather app for SF hands down. Now that IOS 16 is out can you add a widget for the Lock Screen so you don’t have to always open the app?

Mamark123
Aug 23, 2025

Great app for microclimate changes of weather. I live in Soma and like knowing weather in Castro. Great for SF Great app for microclimate changes of weather. I live in Soma and like knowing weather in Castro.

Jimgreer
Aug 3, 2025

This app is pretty much perfect. Has accurate data, simple UI, and loads super fast. And it looks nice! Simple and Great This app is pretty much perfect. Has accurate data, simple UI, and loads super fast. And it looks nice!

pennylanegirl
Apr 29, 2023

Everyone in SF knows Karl can strike at any moment. This app is the best way to check out the micro climates of SFknows Best Weather app for San Francisco Everyone in SF knows Karl can strike at any moment. This app is the best way to check out the micro climates of SFknows

CDG29
Apr 24, 2023

I literally tell everyone about Mr Chilly and it’s been my go to app since I moved to the city 4 years ago! It’s so accurate and the biggest life saver when it comes to getting dressed each day. Thank you to the people that created it, you’ve saved me from being too cold or too hot countless times. Best app for SF people I literally tell everyone about Mr Chilly and it’s been my go to app since I moved to the city 4 years ago! It’s so accurate and the biggest life saver when it comes to getting dressed each day. Thank you to the people that created it, you’ve saved me from being too cold or too hot countless times.

App Details

Developer

Alexander Chia

Platform

ios

Rating

4.9

Last Updated

9/7/2025