A couple small additions that may interest you: we’ve added RSS feeds for users, which means you can follow specific forecasters and get their latest predictions and what they’re wearing. This also means you can plug in your own user feed into your own blog, feed aggregator, lifestream or activity stream to let your friends know what you think about the weather and what you’re wearing every day.

We’ve also done some updating on the maps, such as adding a clothing map aside from the normal forecast map, and adding helpful links to jump to different parts of the world more easily.

Another update which you may actually not notice (and that’s the point) is that predictions made by users with super low ratings will not be combined into each city’s day or night forecast. Everyone’s predictions are still saved and scored no matter how low your score, but taking the negative-scoring users out of the forecast equation makes everything more accurate.

If you want to see some examples of adding weather photos, I present you with two extremes: cumul.us user tbit took some shots of the snowfall on a crisp winter day in Toronto, Canada, and Dominica_steve caught a nice sunset on the Carribean island of Dominica.

It’s great to see users from all over the world, from San Jose to Starkville to Stockholm to Singapore and everywhere in between, predicting the weather and taking photos in their area.

If you’ve tagged photos that appear on cumul.us, feel free to point to them in the comments!

We’ve just added the ability to attach photos to cumul.us! By adding photo to Flickr and tagging it appropriately, it will magically appear on the site.

Say you took a (no doubt fantastic) picture of the the weather, or an amazing sky, or some interesting clouds. If you follow the instructions on cumul.us on how to attach it to a particular location, it will show up magically on the appropriate date and time based on when the picture was taken!

Also, if you submit what you are wearing to cumul.us, you can take a photo of your outfit (whether you want to be in the photo is up to you), tag it according to the instructions on the clothing submissions detail page (which you can get to by clicking the green arrow icon next to any of your clothing submissions), and it will show up on cumul.us. Now instead of just saying what you’re wearing generically, you can attach a photo to show people what you really mean!

One new feature that we’ve quietly slipped into the navigation cloud is a weather map which shows user predictions for the current time and place (wherever now might be). We’ve toyed with the idea of creating a clothing map, but would that be interesting or useful to you? Let us know in the comments or the feedback form.

We’ve also added the data from the individual forecasts onto the homepage, so you can get quick glance of all of the various sources that create the final averaged numbers. Just click on the “based on X feeds and X user predictions” link under the big conditions and temperature and it should pop right up there.

A new batch of updates are up on cumul.us:

• AccuWeather has been added as a data source, and it’s international! It will eventually get integrated into the prediction scoring, but its forecasts need to get a bit more standardized (they seem to like to write very eloquent forecasts that don’t match how other sources describe the weather… you might see some in your area.)
• Clothing submissions are now being represented as icons instead of text, as we feel it makes it a lot easier to scan for what people are wearing than the text did, since people usually wear several clothing items. (Let us know here or in the comments what you think.)
• We’ve also upgraded the system that guesses where you are if you don’t have your location set in your preferences. It should be much improved, but let us know if it still has trouble finding you. (If you leave a note, please tell us anything else you can about where you are accessing the site from: home or work, city, country, internet provider, IP address, your dog’s name, etc.)

And more new stuff is coming! Anything in particular you’d like to see? Drop a note in the comments or the feedback form.

We have just added data from the National Oceanic and Atmospheric Administration and WeatherBug into cumul.us. That means if you are in the United States, you should now have 4 sources aggregated into your forecasts, and if you are outside the US you will have up to 3 sources available.

We are adding as many as we can, so if you have a weather data source you like, let us know!

A day into the site being live, I’ve been noticing a lot of potentially mistaken submissions for Seattle. While I’d like to wish people were interesting in guessing what the weather will be like in my home city, I know that it’s actually a problem on our end. There is some detection work that goes on to try to guess where people are visiting the site from, but if it can’t tell where you are from, it defaults to Seattle. The problem is that the detection is rudimentary, and has trouble with corporate firewalls.

For one, if you are registered, you can edit your preferences and set a default location that it will remember where you are whenever you login or move around the site. I will also be working on improving the detection system, so that it should makes things much better for those who just want to come to the site while at work and not have to do too much.

Another point that has come up repeatedly is the desire for seeing the weather in Celsius rather than Fahrenheit. Well, that too is a privilege of membership right now. If you are a registered user, you can change it to whatever you prefer. Not only can you change it to Celsius, but if you wanted to see and predict the weather in Kelvin or Delisle or the Newton scale, there’s nothing stopping you. Just don’t be shocked when it says it’s 280° out.

You are reading the first post of the official blog for cumul.us. This space will be a channel to let you know about things that are happening on the site, and where we have a better to way to discuss things together without resorting to e-mail and the feedback form.

Here we will be announcing new features, telling you about new weather data sources as they come along (there are more coming in soon, trust me), getting your suggestions and ideas (which I know there are already a ton) and being generally as transparent (ok, maybe translucent) as possible.

Anyways, welcome!