September is one of the most challenging months in terms of clothing selection. One can expect to see both light summer dresses and heavy winter coats within a day! Therefore, outfits must be chosen accordingly to the time of the day, in order to be prepared for any weather changes.
Outfits that have a transitional character may help to keep the balance between summer and winter modes. The most common transitional pieces include light knitwear, blazers, trench coats, midi skirts, straight jeans, loafers, and other warm yet comfortable clothes that can be layered throughout the day. Such outfits are ideal for September days in both the US and Europe since there is a high chance that one would have to endure cold mornings and hot evenings within one day.
Ahead, discover 11 transitional fall outfits for women to wear in September, designed to feel seasonal, polished, and practical without leaning too heavily into cold-weather dressing.
1. Lightweight Knit With Straight-Leg Jeans and Loafers
Pin itWhen the mornings begin to cool but afternoons still hold on to some warmth, one of the easiest things to toss on is a light knit. Throw on a fine knit crew or relaxed sweater with straight leg jeans and loafers for an easygoing yet slightly more autumnal September look that doesn't feel too hot.
The knit offers enough coverage for chilly mornings and evenings, but denim keeps it practical for everyday wear, while loafers add polish without bulk, making for an easygoing early fall look for women.
Try cream, camel, soft grey, or navy with mid-wash denim, then add a leather shoulder bag and simple jewelry. As the weather gets cooler later in the season, these fall outfit ideas for women offer plenty of inspiration for adding warmer layers without losing that polished feel.
2. White Tee With Tailored Trousers, a Light Trench and Ballet Flats
Pin itA white tee is by no means out of fashion only by September. Throw it on with tailored trousers and a trench coat, and you are all set for a warm day without being underdressed at the same time. Ballet flats add to the elegance while keeping you light and airy.
Your top is breathable, but the trench is ready to be tied at your waist or completely taken off when the weather gets cooler. Tailored trousers keep you neat and tie the overall look together. This is what we suggest going from one office job to another during September.
Go for beige, stone, navy, or chocolate-colored trousers and a structured tote in your hands with only a few pieces of jewelry. On colder days, layering will be required, and we have some amazing suggestions for fall fashion outfit ideas for women that include a ton of blazers, coats, and more.
Blazer and jeans outfits for women
3. Cardigan Over a Tank With a Midi Skirt and Loafers
Pin itSeptember is the perfect time to show off an outfit that can be worn while transitioning from warm summer days to cool fall nights. A light cardigan layered over a simple tank top and worn down with a midi skirt and loafers creates a chic yet breathable outfit that is perfect for both cooler evenings in the city or still warm afternoons out of the office.
The sleeveless tank keeps you cool while the light sweater adds enough warmth to keep you comfortable as temperatures cool overnight. The midi skirt adds flow to the outfit while still keeping it light enough for warm afternoons. A fine knit sweater is also perfect in warmer months, while a heavier knit will be too cold. To complete the look, wear a shoulder leather bag with minimal jewelry on.
To stay on trend as the weather gets cooler, try these sweater and jeans outfits that are easy to keep changing as fall wears on.
4. Relaxed Blazer With a Sleeveless Top, Jeans and Slingback Flats
Pin itA relaxed blazer is one of the best things for these September days that started cool and warmed up by lunchtime. Throw it on over your favorite sleeveless top, pair with straight leg jeans, and slip on a pair of slingback flats for a put-together transitional outfit in a pretty weight for early fall. This look is one of the easiest early fall outfits to rock when the weather is a bit unpredictable.
The sleeveless top will keep you cool while the blazer will add a light layer in case the temperature dips. Straight leg denim adds some structure to the outfit without making it feel too formal, making this a stylish early autumn outfit that can work for city days and everyday office outfits.
Try a blazer in camel, taupe, navy, or subtle checks, with a leather belt and structured handbag. If you want to take this same put-together attitude to your evening plans, these fall date night outfits can be layered more dressily for cooler nights.
5. Button-Down Shirt With Cropped Trousers and Loafers
Pin itA relaxed button-down shirt and cropped tailored trousers in 2 different pieces are a great solution for those early September days when it is still warm enough to be in summer but cold enough for fall. Roll your sleeves and add loafers to complete the look and feel ready for a light but not too dressy September day.
The loose blouse keeps you cool, while the tailored trousers give the outfit its fall edge. The cropped style lets you show off your shoes, so loafers, ballet flats, or slingbacks will all work perfectly well to style your look for a warm but breezy day on the brink of winter.
Classic loafers made from leather are the best choice to add a touch of preppy style to the outfit, while ballet flats add femininity and softness to the well-structured trousers. If you are trying to find out how to style your clothes, the ultimate guide to the 11 types of shoes for women will help you understand what footwear styles go well together and what outfits they could complement.
6. Slip Dress With a Lightweight Knit and Sneakers
Pin itYou do not need to put your beloved silk skirt away just because September approaches. Just throw a light sweater in a crewneck style and some sneakers to create an ultimate summer-to-autumn outfit that is perfect for a mild day in early fall.
Your skin will still be able to breathe due to the open space of the dress, and the sweater will keep you warm enough during the evenings and mornings. These two garments, paired with sneakers, will create a perfect look for a transition season.
Moreover, you can choose from white, camel, gray, or burgundy color of the sweater in a crewneck style and let it peek out from under your skirt or dress. Complete the look with a small shoulder bag and some minimal jewelry. As it gets colder, you can exchange sneakers for ankle boots and keep using this outfit in late autumn.
7. Denim Jacket With a Midi Skirt and Ballet Flats
Pin itA denim jacket is a great option for the month of September since it adds extra warmth without overdoing it. Style it with a fitted t-shirt or a tank top, a midi skirt with ballet flats for a light early fall outfit.
The skirt will allow you to stay comfortable on a warm day while the jacket will protect you from the cool nights. The structured denim jacket in combination with the flowy skirt creates this amazing transition look that is both stylish and not too heavy.
Opt for a skirt in burgundy, olive, chocolate, or a print, and add a mini shoulder bag and minimal jewelry. If you like this softer autumn look, check out our other Cute Fall Outfits for Women for more ideas!
8. Sweater Vest With a White Tee, Tailored Trousers and Sneakers
Pin itIf it is too hot for a full sweater but you want to avoid wearing something that screams of summer, a sweater vest could be the perfect addition to your outfit. Throw on one over a white tee and pair it with some well-tailored trousers and relaxed, clean sneakers for a chic September look that is appropriate for a mild fall day.
The light sleeves will keep you from being too hot, while the vest adds enough texture to the otherwise simple outfit to make you look trendy and fashionable. The tailored look of the trousers balances the casual ness of the top, making it the perfect summer-to-fall transitional outfit that can get you through unpredictable September days.
Go for a neutral color in either the trousers or the vest, or try pairing a camel, chocolate brown, burgundy, or olive vest with neutral-colored shoes and accessories. Add on a leather tote and minimal jewelry for a sophisticated outfit that transitions effortlessly into fall. When the cool weather truly kicks in, find more knit and denim outfits in our sweater and jeans outfits guide.
9. Satin Midi Skirt With a Lightweight Sweater and Slingback Heels
Pin itA satin midi skirt in beautiful champagne, chocolate, or burgundy is perfect for those who want to step up their September dressing game without immediately diving into cold-weather layers. Paired with a lightweight sweater and slingback heels, it creates a polished transitional outfit that is perfect for days when the temperature is still warm enough for bare legs. The soft sheen of satin contrasts the woolen knit and adds volume to the look, while the sweater provides enough warmth for a chilly evening. It is an easygoing early fall date outfit, but one that still looks put together and seasonally appropriate.
Complete the look with a mini structured bag and minimal jewelry. As the weather starts to turn, take a look at our fall date night outfit ideas for more cool and warm-weather outfit inspo.
10. Striped Long-Sleeve Top With Ecru Jeans and Loafers
Pin itRather than swapping your summer whites for heavier dark shades in autumn, keep some lighter denim items to carry you through to the end of the season. Try a striped top with long sleeves in ecru or off-white. This smart combination works well in a city like Paris, London, Amsterdam or New York, and looks great with leather loafers. The long sleeves will keep you warm on a cool morning, then the lighter denim feels less restrictive on a hotter afternoon.
Stripes also add interest without bulk or extra layers, and help to avoid a definite seasonal transition in the middle of September. Add tan belts, chocolate bags and accents in burgundy, and if it gets cooler in the evenings just throw on a light cardigan or trench rather than a heavy coat.
11. Suede Jacket With a Fitted Tee, Dark Jeans and Ankle Boots
Pin itSeptember is a great time to introduce some richer textures before the need for heavy layers arises. A light suede jacket worn over a fitted white or cream tee goes a long way towards lightening up dark-washed jeans for the season. Finish with some sleek ankle boots for a between-seasons kind of look that feels both relaxed and pulled together at the same time.
Suedes add a visual warmth without the bulk of a heavy coat and the simplicity of the white or cream t-shirt ensures comfort as the afternoons cool down. Dark denim also helps to transition the palette away from the warm neutrals of summer but without tipping things into wintry territory.
Go with tan, camel, chocolate or dark olive suedes and add a structured leather bag and some minimalist jewelry. Should you want to explore different footwear as it gets colder, then our guide to the types of shoes for women is a good start to find pieces that work from milder September days to cooler evenings as the month progresses.
Quick Tips for Dressing Between Summer and Fall
Pin itThe easiest way to dress well in September is to create outfits around layers that you can shed. Starting with breathable basics like t-shirts, tanks, light shirts or knits and adding a cardigan, blazer, denim jacket or trench when it gets chilly.
Save your heavy wool coats and bulky sweaters for later in the season, and instead try introducing the texture and color of autumn with suede, leather, denim, burgundy, camel, olive, chocolate and navy tones to lighter pieces.
Loafers, ballet flats, sneakers, slingbacks and ankle boots also work well in mild weather. As temperatures continue to drop, our fall outfit ideas for women offer more inspiration for adding warmer layers while keeping your outfits polished.
Final Thoughts
September style boils down to finding a balance between light and warm clothing. You want to be dressed so that it is not too hot, but not cold enough to need a thick sweater either. Light knits, dresses, skirts, denim, loafers, jackets, and more all go together so easily and simply.
Use these 11 transitional outfits for women as inspiration, but feel free to mix and match different items. Think about the weather where you live, and what you feel most comfortable in. Start off with the looks that are most your style, and play around with the rest as the month wears on.
As the temperatures start to drop, our fall outfit ideas can help you carry the looks you love from September into the next season.

