If Labor Day weekend didn’t signal the end of summer for you, today’s cold weather certainly does. And with fall, of course, things get busier in Washington, DC — and the tech scene is no different. There are lots of interesting technology events on the calendar in September. Below is our roundup of what’s going on this week, and check out DC Tech Events for a full listing.

Tuesday, September 6

7:00 pm

DC jQuery Meetup : Want to quickly learn some new tricks with jQuery? This month’s meetup will feature lightning talks on topics like javascript testing with Qunit, speeding up jQuery calls, and getting started with HTML5 boilerplate. There will also be a couple quick talks on jQuery plugins you should know about.

Wednesday, September 7

6:00–8:00 pm

Crisis Mappers Meetup : Crisis Mappers is hosting a get together to casually meet and discuss what folks are working on in the mapping and disaster relief fields. Head to Local 16 if you’d like to join in!

7:00–9:00 pm

Geo DC Meetup : The geo scene in DC is filled with people doing interesting things. At this month’s meetup, people will present on four mapping topics, ranging from showing off maps of national broadband access and the extent of the famine in the Horn of Africa, to discussing cartographic illustration and using Geo-Django. Come out for the talks and to meet people working in this space.

Thursday, September 8

6:15 pm

DC Lean Startup Circle : This meetup will look at the “art of the pivot”, and how successful start ups prepare for and successfully make changes in their processes and business models when called for

Saturday, September 10

10:00 am — 5:00 pm

Transit Hack Day : Want to create tools and visualizations around bus maps, Capital Bikeshare stations, and other transit data? Come out to this hack day to team up with others to create some fun new transportation tools for DC. For more details, check out this post in Greater Great Washington.